{"title":"Grundfos Scala Pressure Boosting System","description":"\u003cstyle\u003e\n.sc-wrap{font-family:Arial,Helvetica,sans-serif;color:#1a1a1e;background:#E1E3E6;padding:0;margin:0 -20px;line-height:1.55}\n.sc-wrap *{box-sizing:border-box}\n.sc-hero{background:#4A4A4F;color:#fff;padding:64px 32px;text-align:center;border-bottom:6px solid #B3122A}\n.sc-hero h1{font-family:\"Arial Black\",Arial,sans-serif;font-size:40px;line-height:1.05;margin:0 0 14px;letter-spacing:.5px;text-transform:uppercase}\n.sc-hero h1 span{color:#B3122A}\n.sc-hero p{font-size:17px;max-width:820px;margin:0 auto;color:#C7CBD1}\n.sc-tag{display:inline-block;background:#B3122A;color:#fff;font-family:\"Arial Black\",Arial,sans-serif;font-size:12px;letter-spacing:2px;padding:6px 14px;margin-bottom:18px;text-transform:uppercase}\n.sc-stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:2px;max-width:920px;margin:32px auto 0;background:#5c5c62}\n.sc-stat{background:#4A4A4F;padding:16px 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a.sc-btn,.sc-cta-row a.sc-btn-out{margin:0}\n.sc-phone{font-family:\"Arial Black\",Arial,sans-serif;font-size:22px;color:#B3122A;letter-spacing:1px}\n.sc-foot{text-align:center;padding:24px;font-size:12px;color:#9B9EA3;background:#E1E3E6}\n@media(max-width:640px){.sc-hero h1{font-size:28px}.sc-hero{padding:44px 20px}.sc-sec{padding:32px 18px}.sc-h2{font-size:22px}.sc-card h3{font-size:19px}.sc-cta h2{font-size:22px}.sc-intro{padding:28px 20px}.sc-why{padding:36px 20px}.sc-faq{grid-template-columns:1fr}.sc-stat b{font-size:20px}.sc-nav a{font-size:10px;padding:10px 8px}}\n\u003c\/style\u003e\n\u003cdiv class=\"sc-wrap\"\u003e\n\n\u003csection class=\"sc-hero\" id=\"sc-top\"\u003e\n\u003cspan class=\"sc-tag\"\u003eGrundfos Pumps\u003c\/span\u003e\n\u003ch1\u003eGrundfos SCALA\u003cbr\u003e\u003cspan\u003ePressure Boosting Systems\u003c\/span\u003e\n\u003c\/h1\u003e\n\u003cp\u003eSCALA1 and SCALA2 — all-in-one self-priming boosters that put steady water pressure at every tap. Grundfos’ best-selling home and light-commercial booster line, stocked for the Gulf Coast with engineering-led sizing.\u003c\/p\u003e\n\u003cdiv class=\"sc-stats\"\u003e\n\u003cdiv class=\"sc-stat\"\u003e\n\u003cb\u003e2 Systems\u003c\/b\u003e\u003cspan\u003eSCALA1 \u0026amp; SCALA2\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sc-stat\"\u003e\n\u003cb\u003e26 ft\u003c\/b\u003e\u003cspan\u003eSelf-priming lift\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sc-stat\"\u003e\n\u003cb\u003e13–22 GPM\u003c\/b\u003e\u003cspan\u003ePer unit\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sc-stat\"\u003e\n\u003cb\u003eUp to 180 ft\u003c\/b\u003e\u003cspan\u003eMax head\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sc-stat\"\u003e\n\u003cb\u003eNSF 61 \/ 372\u003c\/b\u003e\u003cspan\u003eUL \u0026amp; CSA listed\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\n\u003cnav class=\"sc-nav\"\u003e\n\u003ca href=\"#sc-line\"\u003eThe Line\u003c\/a\u003e\n\u003ca href=\"#sc-vs\"\u003eSCALA1 vs SCALA2\u003c\/a\u003e\n\u003ca href=\"#sc-perf\"\u003ePerformance\u003c\/a\u003e\n\u003ca href=\"#sc-sizing\"\u003eSizing\u003c\/a\u003e\n\u003ca href=\"#sc-select\"\u003eWhich One\u003c\/a\u003e\n\u003ca href=\"#sc-features\"\u003eFeatures\u003c\/a\u003e\n\u003ca href=\"#sc-videos\"\u003eVideos\u003c\/a\u003e\n\u003ca href=\"#sc-compare\"\u003evs Other Brands\u003c\/a\u003e\n\u003ca href=\"#sc-acc\"\u003eAccessories\u003c\/a\u003e\n\u003ca href=\"#sc-faq\"\u003eFAQ\u003c\/a\u003e\n\u003c\/nav\u003e\n\n\u003cdiv class=\"sc-intro\"\u003e\n\u003cp\u003e\u003cstrong style=\"color:#4a4a4f;font-family:'Arial Black',Arial,sans-serif;\"\u003eGrundfos\u003c\/strong\u003e is a Danish pump manufacturer and one of the largest in the world. SCALA is its integrated domestic and light-commercial booster platform: a multistage pump, motor, small pressure vessel, non-return valve and electronic control packaged in a single self-priming enclosure. There is no separate pressure switch or external tank to plumb — connect suction and discharge, set the pressure, and the system delivers water on demand.\u003c\/p\u003e\n\u003cp\u003eThe line splits into two systems. \u003cstrong style=\"color:#4a4a4f;font-family:'Arial Black',Arial,sans-serif;\"\u003eSCALA1\u003c\/strong\u003e is a fixed-speed booster with Bluetooth, an external input and twin-pump capability. \u003cstrong style=\"color:#4a4a4f;font-family:'Arial Black',Arial,sans-serif;\"\u003eSCALA2\u003c\/strong\u003e is a variable-speed unit that holds constant pressure at every tap regardless of inlet fluctuation, at one of the lowest noise levels in its class. Watermain Supply stocks the U.S. 60 Hz range with NPT connections and U.S. plugs, backed by engineering-led sizing to your fixture count, elevation and inlet pressure. Compare the two below, or call 1-888.510.4036 and we will size it for you. Genuine Grundfos equipment, factory-new in original packaging — sold and supported by Watermain Supply, an independent industrial distributor.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003csection class=\"sc-sec\" id=\"sc-line\"\u003e\n\u003ch2 class=\"sc-h2\"\u003eThe SCALA Line\u003c\/h2\u003e\n\u003cp class=\"sc-sub\"\u003eTwo all-in-one platforms on the same self-priming, integrated concept — one fixed-speed and twin-capable, one variable-speed for constant pressure.\u003c\/p\u003e\n\u003cdiv class=\"sc-grid2\"\u003e\n\n\u003cdiv class=\"sc-card\"\u003e\n\u003cdiv class=\"sc-card-img\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0264\/1913\/4527\/files\/Grundfos_scala_1.webp?v=1788620733\" alt=\"Grundfos SCALA1 self-priming pressure booster pump\" loading=\"lazy\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"sc-card-body\"\u003e\n\u003ch3\u003eSCALA1\u003c\/h3\u003e\n\u003cp class=\"sc-tagline\"\u003eFixed-speed, twin-capable booster\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sc-spec\"\u003e\n\u003cdiv\u003e\n\u003cb\u003e13–22 GPM\u003c\/b\u003enominal flow\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cb\u003e150–180 ft\u003c\/b\u003emax head (60 Hz)\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cb\u003e2 Models\u003c\/b\u003e3-45 \u0026amp; 5-55\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cb\u003e115 \/ 230 V\u003c\/b\u003e1-phase\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sc-card-body\"\u003e\n\u003cp class=\"sc-desc\"\u003eA self-priming multistage booster that packs pump, water-cooled motor, small vessel, check valve and controls into one composite enclosure. Fixed-speed operation with Bluetooth (Grundfos GO) and an external input for float-switch and irrigation control. Two units pair into a twin booster for standby duty or higher flow. Runs under 55 dB(A), self-primes from 26 ft of lift, 1 in NPT ports.\u003c\/p\u003e\n\u003cdiv class=\"sc-label\"\u003eAvailable models\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003eSCALA1 3-45 — 13 GPM, 150 ft max head\u003c\/li\u003e\n\u003cli\u003eSCALA1 5-55 — 22 GPM, 180 ft max head\u003c\/li\u003e\n\u003cli\u003eMax system pressure 116 psi, self-priming to 26 ft\u003c\/li\u003e\n\u003cli\u003eTwin-capable, Bluetooth, external input\u003c\/li\u003e\n\u003cli\u003eNSF\/ANSI 61, 372, CSA, CE\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sc-apps\"\u003e\n\u003cstrong\u003eBest for\u003c\/strong\u003eHomes on city water with low street pressure, tank- and roof-fed systems, shallow wells, irrigation and water transfer, and installs that may need a standby or higher-flow twin.\u003c\/div\u003e\n\u003ca class=\"sc-btn\" href=\"\/products\/grundfos-scala1-self-priming-pressure-booster-pump\"\u003eView SCALA1\u003c\/a\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"sc-card\"\u003e\n\u003cdiv class=\"sc-card-img\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0264\/1913\/4527\/files\/Grundros_Scala_2.webp?v=1788620714\" alt=\"Grundfos SCALA2 variable speed constant pressure booster pump\" loading=\"lazy\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"sc-card-body\"\u003e\n\u003ch3\u003eSCALA2\u003c\/h3\u003e\n\u003cp class=\"sc-tagline\"\u003eVariable-speed constant pressure\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sc-spec\"\u003e\n\u003cdiv\u003e\n\u003cb\u003eUp to 18 GPM\u003c\/b\u003emax flow\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cb\u003e147 ft\u003c\/b\u003emax head\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cb\u003e3\/4 HP\u003c\/b\u003epermanent magnet\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cb\u003e115 \/ 230 V\u003c\/b\u003e1-phase\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sc-card-body\"\u003e\n\u003cp class=\"sc-desc\"\u003eA fully integrated variable-speed booster. An integrated pressure sensor and inverter adjust motor speed continuously to hold a constant set point across the whole home, with soft starts and steady flow even as inlet pressure swings. Aluminum-and-composite build, integrated diaphragm tank, one of the quietest boosters in its class at 44 dB(A). Self-priming to 26 ft, 1 in NPT ports.\u003c\/p\u003e\n\u003cdiv class=\"sc-label\"\u003eKey specifications\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003eSCALA2 3-45 — single model, 115 V or 230 V\u003c\/li\u003e\n\u003cli\u003eDefault set point 43 psi, adjustable\u003c\/li\u003e\n\u003cli\u003eMax system pressure 145 psi, max inlet 87 psi\u003c\/li\u003e\n\u003cli\u003epH 4-9, chloride to 300 ppm (harder feeds)\u003c\/li\u003e\n\u003cli\u003eNSF\/ANSI 61, 372, UL, CSA, WRAS\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sc-apps\"\u003e\n\u003cstrong\u003eBest for\u003c\/strong\u003eWhole-home constant pressure, city mains with varying pressure, multi-fixture homes, kitchen and bath comfort, and harder or chlorinated municipal feeds.\u003c\/div\u003e\n\u003ca class=\"sc-btn\" href=\"\/products\/grundfos-scala2-variable-speed-constant-pressure-booster-pump\"\u003eView SCALA2\u003c\/a\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e\n\u003c\/section\u003e\n\n\u003csection class=\"sc-sec alt\" id=\"sc-vs\"\u003e\u003cdiv class=\"sc-in\"\u003e\n\u003ch2 class=\"sc-h2\"\u003eSCALA1 vs SCALA2\u003c\/h2\u003e\n\u003cp class=\"sc-sub\"\u003eBoth are self-priming, all-in-one boosters with the same protection suite. The deciding factor is fixed-speed with twin capability (SCALA1) versus variable-speed constant pressure (SCALA2).\u003c\/p\u003e\n\u003cdiv class=\"sc-cmp-intro\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0264\/1913\/4527\/files\/Grundfos_scala_1_twin_system.webp?v=1788620733\" alt=\"Grundfos SCALA1 twin booster system on base plate\" loading=\"lazy\"\u003e\n\u003cp class=\"sc-p\"\u003eSCALA1 wins on range, irrigation control and redundancy — two units pair into a twin booster for standby or higher flow. SCALA2 wins on comfort and municipal duty — true constant pressure, quieter operation, a higher system-pressure rating and six times the chloride tolerance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sc-tw\"\u003e\u003ctable class=\"sc-t\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eSCALA1\u003c\/th\u003e\n\u003cth\u003eSCALA2\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpeed control\u003c\/td\u003e\n\u003ctd\u003eFixed speed\u003c\/td\u003e\n\u003ctd\u003eVariable speed (VFD)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePressure behavior\u003c\/td\u003e\n\u003ctd\u003eBoosts to a fixed curve\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"sc-hl\"\u003eConstant set-point pressure\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModels\u003c\/td\u003e\n\u003ctd\u003e3-45 and 5-55\u003c\/td\u003e\n\u003ctd\u003e3-45 (single)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNominal \/ max flow\u003c\/td\u003e\n\u003ctd\u003e13-22 GPM\u003c\/td\u003e\n\u003ctd\u003e13 GPM \/ up to 18 GPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax head\u003c\/td\u003e\n\u003ctd\u003e150-180 ft (60 Hz)\u003c\/td\u003e\n\u003ctd\u003e147 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMotor\u003c\/td\u003e\n\u003ctd\u003e0.8-1.1 HP (P2)\u003c\/td\u003e\n\u003ctd\u003e3\/4 HP (P1 550 W), permanent magnet\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage\u003c\/td\u003e\n\u003ctd\u003e115 V or 230 V, 1-phase\u003c\/td\u003e\n\u003ctd\u003e115 V or 230 V, 1-phase\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax system pressure\u003c\/td\u003e\n\u003ctd\u003e116 psi (8 bar)\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"sc-hl\"\u003e145 psi (10 bar)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax inlet pressure\u003c\/td\u003e\n\u003ctd\u003e43 psi (3-45) \/ 29 psi (5-55)\u003c\/td\u003e\n\u003ctd\u003e87 psi (6 bar)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNoise level\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 55 dB(A)\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"sc-hl\"\u003e44 dB(A)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSelf-priming lift\u003c\/td\u003e\n\u003ctd\u003e26 ft\u003c\/td\u003e\n\u003ctd\u003e26 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTwin \/ multi-pump\u003c\/td\u003e\n\u003ctd\u003e\n\u003cspan class=\"sc-hl\"\u003eElectronic twin\u003c\/span\u003e (comms cable, alternation, staging)\u003c\/td\u003e\n\u003ctd\u003eParallel twin kit (pumps run independently)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConnectivity\u003c\/td\u003e\n\u003ctd\u003eBluetooth (Grundfos GO), external input\u003c\/td\u003e\n\u003ctd\u003eOn-unit display\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003epH \/ max chloride\u003c\/td\u003e\n\u003ctd\u003e4-7 \/ 50 ppm\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"sc-hl\"\u003e4-9 \/ 300 ppm\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEnclosure\u003c\/td\u003e\n\u003ctd\u003eComposite\u003c\/td\u003e\n\u003ctd\u003eAluminum + composite\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePorts\u003c\/td\u003e\n\u003ctd\u003e1 in NPT\u003c\/td\u003e\n\u003ctd\u003e1 in NPT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertifications\u003c\/td\u003e\n\u003ctd\u003eNSF 61\/372, CSA, CE\u003c\/td\u003e\n\u003ctd\u003eNSF 61\/372, cULus, WRAS, CE\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\n\u003cdiv class=\"sc-call\"\u003e\n\u003cstrong\u003eQuick rule.\u003c\/strong\u003e Choose SCALA2 when the goal is steady pressure at the tap all day, quiet operation, or a demanding municipal feed. Choose SCALA1 when you need irrigation\/float control, a wider flow range, or a coordinated two-pump system with alternation and standby staging (SCALA2 offers a parallel twin kit, but the pumps are not electronically paired).\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/section\u003e\n\n\u003csection class=\"sc-sec\" id=\"sc-perf\"\u003e\n\u003ch2 class=\"sc-h2\"\u003eRated Performance\u003c\/h2\u003e\n\u003cp class=\"sc-sub\"\u003eDocumented duty points for the U.S. 60 Hz models. Use these to confirm your required flow at the required boost sits within the pump’s range with margin; request the manufacturer pump curve for the exact duty point before specifying.\u003c\/p\u003e\n\u003cdiv class=\"sc-tw\"\u003e\u003ctable class=\"sc-t\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eSCALA1 3-45\u003c\/th\u003e\n\u003cth\u003eSCALA1 5-55\u003c\/th\u003e\n\u003cth\u003eSCALA2 3-45\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003eFixed speed\u003c\/td\u003e\n\u003ctd\u003eFixed speed\u003c\/td\u003e\n\u003ctd\u003eVariable speed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax head\u003c\/td\u003e\n\u003ctd\u003e150 ft\u003c\/td\u003e\n\u003ctd\u003e180 ft\u003c\/td\u003e\n\u003ctd\u003e147 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNominal flow\u003c\/td\u003e\n\u003ctd\u003e13 GPM\u003c\/td\u003e\n\u003ctd\u003e22 GPM\u003c\/td\u003e\n\u003ctd\u003e13 GPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNominal duty point\u003c\/td\u003e\n\u003ctd\u003e15.8 GPM at 82 ft\u003c\/td\u003e\n\u003ctd\u003e23.5 GPM at 82 ft\u003c\/td\u003e\n\u003ctd\u003eholds set point (see curve)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStart pressure\u003c\/td\u003e\n\u003ctd\u003e32 psi\u003c\/td\u003e\n\u003ctd\u003e41 psi\u003c\/td\u003e\n\u003ctd\u003eadjustable (default 43 psi)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax inlet pressure\u003c\/td\u003e\n\u003ctd\u003e43 psi\u003c\/td\u003e\n\u003ctd\u003e29 psi\u003c\/td\u003e\n\u003ctd\u003e87 psi\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax system pressure\u003c\/td\u003e\n\u003ctd\u003e116 psi\u003c\/td\u003e\n\u003ctd\u003e116 psi\u003c\/td\u003e\n\u003ctd\u003e145 psi\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMotor\u003c\/td\u003e\n\u003ctd\u003e0.80 HP (P2)\u003c\/td\u003e\n\u003ctd\u003e1.10 HP (P2)\u003c\/td\u003e\n\u003ctd\u003e3\/4 HP (P1 550 W)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\n\u003cp class=\"sc-note\"\u003eBoost in psi equals head in feet multiplied by 0.433. Fixed-speed SCALA1 delivers pressure along its pump curve; SCALA2 holds the pressure you set, up to its capability, and reduces speed at low demand. Confirm against the current Grundfos data booklet for your model.\u003c\/p\u003e\n\u003c\/section\u003e\n\n\u003csection class=\"sc-sec alt\" id=\"sc-sizing\"\u003e\u003cdiv class=\"sc-in\"\u003e\n\u003ch2 class=\"sc-h2\"\u003eSizing \u0026amp; Best Practices\u003c\/h2\u003e\n\u003cp class=\"sc-sub\"\u003eHow we size a SCALA, and what to check before you install one. Send us your numbers and we will run this for you.\u003c\/p\u003e\n\u003ch3 class=\"sc-h3\"\u003e1. Calculate required boost\u003c\/h3\u003e\n\u003cp class=\"sc-p\"\u003eRequired boost equals the pressure you want at the highest fixture, plus 0.433 psi for every foot of elevation from the pump to that fixture, plus friction loss in the piping, minus the pressure already available at the pump inlet. A two-story home wanting 50 psi upstairs, with the pump in the garage 20 ft below and 25 psi at the meter, needs roughly 50 + (20 × 0.433) + friction − 25 ≈ 34 psi of boost plus pipe losses.\u003c\/p\u003e\n\u003ch3 class=\"sc-h3\"\u003e2. Estimate peak flow honestly\u003c\/h3\u003e\n\u003cp class=\"sc-p\"\u003eSize flow to simultaneous demand, not the sum of every fixture. For homes, a water-supply-fixture-unit method (IPC Table 604.3 \/ Hunter’s curve) converts fixture counts into a realistic peak GPM; for light commercial, the IAPMO Water Demand Calculator is more accurate. A single bath rarely exceeds 8-10 GPM at once; a large home with several baths running is typically 14-22 GPM — squarely in the SCALA band.\u003c\/p\u003e\n\u003ch3 class=\"sc-h3\"\u003e3. Check inlet pressure limits\u003c\/h3\u003e\n\u003cp class=\"sc-p\"\u003eConfirm your static inlet pressure stays under the model limit — especially SCALA1 5-55 at 29 psi. On strong municipal mains, a pressure-reducing valve upstream protects the pump. On a suction lift, remember both SCALA systems self-prime from up to 26 ft, but longer or higher lifts reduce available flow.\u003c\/p\u003e\n\u003cdiv class=\"sc-call\"\u003e\n\u003cstrong\u003eSizing rule of thumb.\u003c\/strong\u003e If your required flow at the required boost lands past 70 percent of a model’s maximum head, step up a model — SCALA1 3-45 to 5-55, or SCALA1 to SCALA2 for constant pressure. Leaving headroom keeps the pump off its steep end-of-curve and quiets operation.\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/section\u003e\n\n\u003csection class=\"sc-sec\" id=\"sc-select\"\u003e\n\u003ch2 class=\"sc-h2\"\u003eWhich SCALA Do You Need?\u003c\/h2\u003e\n\u003cp class=\"sc-sub\"\u003eA selection guide by application. Flow figures assume typical fixture-unit demand; call us with your fixture count and elevation for an engineering-led selection.\u003c\/p\u003e\n\u003cdiv class=\"sc-tw\"\u003e\u003ctable class=\"sc-t\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eApplication\u003c\/th\u003e\n\u003cth\u003eTypical demand\u003c\/th\u003e\n\u003cth\u003eRecommended\u003c\/th\u003e\n\u003cth\u003eNotes\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e1-2 bath home, one story\u003c\/td\u003e\n\u003ctd\u003e8-14 GPM at 40-60 psi\u003c\/td\u003e\n\u003ctd\u003eSCALA2 3-45 or SCALA1 3-45\u003c\/td\u003e\n\u003ctd\u003eSCALA2 for quiet constant pressure; SCALA1 3-45 for lower cost.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3-4 bath home, two story\u003c\/td\u003e\n\u003ctd\u003e14-22 GPM at 50-65 psi\u003c\/td\u003e\n\u003ctd\u003eSCALA1 5-55 or SCALA2 3-45\u003c\/td\u003e\n\u003ctd\u003e5-55 head covers upper-floor showers; SCALA2 for steadier pressure.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWhole-home constant pressure\u003c\/td\u003e\n\u003ctd\u003eVariable\u003c\/td\u003e\n\u003ctd\u003eSCALA2 3-45\u003c\/td\u003e\n\u003ctd\u003eVFD holds set point across changing demand at 44 dB(A).\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCity mains with varying pressure\u003c\/td\u003e\n\u003ctd\u003e10-20 GPM\u003c\/td\u003e\n\u003ctd\u003eSCALA2 3-45\u003c\/td\u003e\n\u003ctd\u003eAdapts speed to inlet swings; 145 psi system rating.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRoof \/ storage \/ break tank\u003c\/td\u003e\n\u003ctd\u003e10-22 GPM\u003c\/td\u003e\n\u003ctd\u003eSCALA1 or SCALA2\u003c\/td\u003e\n\u003ctd\u003eSelf-priming to 26 ft from an atmospheric tank.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShallow well (to 26 ft)\u003c\/td\u003e\n\u003ctd\u003e10-20 GPM\u003c\/td\u003e\n\u003ctd\u003eSCALA1 3-45 or 5-55\u003c\/td\u003e\n\u003ctd\u003eSelf-priming with dry-run protection; add inlet filter.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIrrigation \/ water transfer\u003c\/td\u003e\n\u003ctd\u003e15-22 GPM\u003c\/td\u003e\n\u003ctd\u003eSCALA1 5-55\u003c\/td\u003e\n\u003ctd\u003eExternal input and fixed speed move water A-to-B on demand.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStandby \/ higher peak flow\u003c\/td\u003e\n\u003ctd\u003eUp to ~40 GPM\u003c\/td\u003e\n\u003ctd\u003eSCALA1 Twin\u003c\/td\u003e\n\u003ctd\u003eTwo SCALA1 on the twin kit alternate duty and stage in.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHarder \/ chlorinated feed\u003c\/td\u003e\n\u003ctd\u003eAny\u003c\/td\u003e\n\u003ctd\u003eSCALA2 3-45\u003c\/td\u003e\n\u003ctd\u003epH 4-9 and chloride to 300 ppm tolerance.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\n\u003c\/section\u003e\n\n\u003csection class=\"sc-sec alt\" id=\"sc-features\"\u003e\u003cdiv class=\"sc-in\"\u003e\n\u003ch2 class=\"sc-h2\"\u003eWhat Makes SCALA Different\u003c\/h2\u003e\n\u003cp class=\"sc-sub\"\u003eThe engineering shared across the line, and why it matters on an installation.\u003c\/p\u003e\n\u003cdiv class=\"sc-feat\"\u003e\n\u003cdiv class=\"sc-feat-item\"\u003e\n\u003ch4\u003eAll-in-one, self-priming\u003c\/h4\u003e\n\u003cp\u003ePump, motor, small vessel and check valve in one enclosure that primes from dry to 26 ft of suction lift — draw from a tank, cistern or shallow well without a separate lift pump or external tank.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sc-feat-item\"\u003e\n\u003ch4\u003eConstant pressure (SCALA2)\u003c\/h4\u003e\n\u003cp\u003eThe inverter varies motor speed to hold your set point as demand changes, instead of cycling against a pressure switch. Steady pressure at the tap, soft start and stop, and no water hammer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sc-feat-item\"\u003e\n\u003ch4\u003eTwin capability (SCALA1)\u003c\/h4\u003e\n\u003cp\u003eTwo SCALA1 units pair on a twin kit and communicate over a cable, alternating duty by runtime or starts and staging the second pump in when flow demand rises — standby redundancy without a custom panel. SCALA2 offers a parallel twin accessory set, without electronic pairing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sc-feat-item\"\u003e\n\u003ch4\u003eWater-cooled, quiet\u003c\/h4\u003e\n\u003cp\u003eCooling by the pumped liquid eliminates the fan. SCALA2 runs at 44 dB(A) and both units install in a closet or recess with limited air movement — SCALA1 is rated to 131°F ambient, SCALA2 (60 Hz) to 113°F.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sc-feat-item\"\u003e\n\u003ch4\u003eFull protection suite\u003c\/h4\u003e\n\u003cp\u003eDry-running protection, anti-cycling \/ micro-leakage detection, adjustable maximum-runtime, and current- and temperature-dependent motor protection with automatic restart — no external motor protection needed.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sc-feat-item\"\u003e\n\u003ch4\u003eBluetooth \u0026amp; external input (SCALA1)\u003c\/h4\u003e\n\u003cp\u003eConfigure and monitor over Grundfos GO, and wire an external input for a float switch or irrigation calendar — useful for tank filling and scheduled watering.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sc-feat-item\"\u003e\n\u003ch4\u003eRobust, corrosion-resistant\u003c\/h4\u003e\n\u003cp\u003eComposite construction on SCALA1 and an aluminum-and-composite build on SCALA2 with corrosion-resistant internals; SCALA2 tolerates pH 4-9 and chloride to 300 ppm for harder feeds.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sc-feat-item\"\u003e\n\u003ch4\u003eDrinking-water certified\u003c\/h4\u003e\n\u003cp\u003eBoth systems are certified to NSF\/ANSI 61 and NSF\/ANSI 372 low-lead for potable contact, with CSA electrical listing (SCALA2 adds cULus and WRAS).\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/section\u003e\n\n\u003csection class=\"sc-sec\" id=\"sc-videos\"\u003e\n\u003ch2 class=\"sc-h2\"\u003eSee SCALA In Action\u003c\/h2\u003e\n\u003cp class=\"sc-sub\"\u003eTwo minutes each: how a SCALA2 installs, and how two SCALA1 units become a twin booster. Full installation and service video libraries are on each product page.\u003c\/p\u003e\n\u003cdiv style=\"display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:24px;max-width:980px\"\u003e\n\u003cdiv\u003e\n\u003cdiv style=\"position:relative;padding-top:56.25%;background:#fff;border:1px solid #C7CBD1\"\u003e\u003ciframe src=\"https:\/\/www.youtube.com\/embed\/t_eo6GBKLRA?rel=0\" title=\"How to Install the Grundfos SCALA2 Pump\" loading=\"lazy\" style=\"position:absolute;top:0;left:0;width:100%;height:100%;border:0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003cdiv style=\"font-family:Arial Black,Arial,sans-serif;font-size:13px;color:#4A4A4F;margin-top:8px\"\u003eHow to Install the Grundfos SCALA2 Pump \u003cspan style=\"color:#9B9EA3;font-family:Arial;font-weight:400\"\u003e· 3:58\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv style=\"position:relative;padding-top:56.25%;background:#fff;border:1px solid #C7CBD1\"\u003e\u003ciframe src=\"https:\/\/www.youtube.com\/embed\/tWbMT1AXXp8?rel=0\" title=\"Creating a SCALA1 TWIN Setup\" loading=\"lazy\" style=\"position:absolute;top:0;left:0;width:100%;height:100%;border:0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003cdiv style=\"font-family:Arial Black,Arial,sans-serif;font-size:13px;color:#4A4A4F;margin-top:8px\"\u003eCreating a SCALA1 TWIN Setup \u003cspan style=\"color:#9B9EA3;font-family:Arial;font-weight:400\"\u003e· 2:54\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp class=\"sc-note\"\u003eVideos are published by Grundfos on its official YouTube channel. Content © Grundfos Holding A\/S.\u003c\/p\u003e\n\u003c\/section\u003e\n\n\u003csection class=\"sc-sec\" id=\"sc-compare\"\u003e\n\u003ch2 class=\"sc-h2\"\u003eHow SCALA Compares to Other Brands\u003c\/h2\u003e\n\u003cp class=\"sc-sub\"\u003eWe stock booster pumps from every major line, so we can be straight about where SCALA fits. Start in-family: Grundfos CMBE is the step up when a job outgrows SCALA. Below that, most residential VFD boosters compare most directly with SCALA2; SCALA1 is the fixed-speed, twin-capable alternative. All hydraulic figures are single-unit.\u003c\/p\u003e\n\n\u003ch3 class=\"sc-h3\"\u003eGrundfos SCALA vs Grundfos CMBE\u003c\/h3\u003e\n\u003cdiv class=\"sc-tw\"\u003e\u003ctable class=\"sc-t\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eSCALA1\u003c\/th\u003e\n\u003cth\u003eSCALA2\u003c\/th\u003e\n\u003cth\u003eCMBE\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eControl\u003c\/td\u003e\n\u003ctd\u003eFixed speed\u003c\/td\u003e\n\u003ctd\u003eVariable speed\u003c\/td\u003e\n\u003ctd\u003eVariable speed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFlow\u003c\/td\u003e\n\u003ctd\u003e13-22 GPM\u003c\/td\u003e\n\u003ctd\u003eup to 18 GPM\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"sc-hl\"\u003eup to ~60 GPM\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax head\u003c\/td\u003e\n\u003ctd\u003e150-180 ft\u003c\/td\u003e\n\u003ctd\u003e147 ft\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"sc-hl\"\u003eup to 325 ft\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModels\u003c\/td\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003ctd\u003e10 (+3 TWIN systems)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSelf-priming\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"sc-hl\"\u003e26 ft\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"sc-hl\"\u003e26 ft\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eNo — max 3.28 ft lift\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax system pressure\u003c\/td\u003e\n\u003ctd\u003e116 psi\u003c\/td\u003e\n\u003ctd\u003e145 psi\u003c\/td\u003e\n\u003ctd\u003e145 psi\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHydraulics\u003c\/td\u003e\n\u003ctd\u003eComposite\u003c\/td\u003e\n\u003ctd\u003eAluminum + composite\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"sc-hl\"\u003eStainless AISI 304\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNoise\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 55 dB(A)\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"sc-hl\"\u003e44 dB(A)\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e≤ 55 dB(A)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMulti-pump\u003c\/td\u003e\n\u003ctd\u003eElectronic twin\u003c\/td\u003e\n\u003ctd\u003eParallel twin kit\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"sc-hl\"\u003eTWIN with cascade control \u0026amp; alternation\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTypical use\u003c\/td\u003e\n\u003ctd\u003eHome, irrigation, transfer\u003c\/td\u003e\n\u003ctd\u003eWhole-home comfort\u003c\/td\u003e\n\u003ctd\u003eWhole building, light commercial\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\n\u003cp class=\"sc-note\"\u003eCMBE is the Grundfos step up from SCALA: a stainless packaged booster line reaching roughly three times the flow and twice the head, with a true cascade-controlled twin for buildings. The trade: CMBE is not self-priming — it needs flooded or near-flooded suction — so tank draws and shallow wells stay with SCALA. \u003ca href=\"\/products\/grundfos-cmbe-constant-pressure-booster-pump\" style=\"color:#B3122A;font-family:'Arial Black',Arial,sans-serif;text-decoration:none\"\u003eView the CMBE line →\u003c\/a\u003e\u003c\/p\u003e\n\n\u003ch3 class=\"sc-h3\"\u003eGrundfos SCALA vs DAB Esybox\u003c\/h3\u003e\n\u003cdiv class=\"sc-tw\"\u003e\u003ctable class=\"sc-t\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eSCALA2\u003c\/th\u003e\n\u003cth\u003eDAB Esybox Mini 3\u003c\/th\u003e\n\u003cth\u003eDAB Esybox\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eControl\u003c\/td\u003e\n\u003ctd\u003eVariable speed\u003c\/td\u003e\n\u003ctd\u003eVariable speed\u003c\/td\u003e\n\u003ctd\u003eVariable speed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax flow\u003c\/td\u003e\n\u003ctd\u003eup to 18 GPM\u003c\/td\u003e\n\u003ctd\u003e21.1 GPM\u003c\/td\u003e\n\u003ctd\u003e31.7 GPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax head\u003c\/td\u003e\n\u003ctd\u003e147 ft\u003c\/td\u003e\n\u003ctd\u003e180 ft\u003c\/td\u003e\n\u003ctd\u003e213 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMotor\u003c\/td\u003e\n\u003ctd\u003e3\/4 HP\u003c\/td\u003e\n\u003ctd\u003e1.1 HP\u003c\/td\u003e\n\u003ctd\u003e2.1 HP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage\u003c\/td\u003e\n\u003ctd\u003e115 \/ 230 V\u003c\/td\u003e\n\u003ctd\u003e115 \/ 230 V (one unit)\u003c\/td\u003e\n\u003ctd\u003e230 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax system pressure\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"sc-hl\"\u003e145 psi\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e109 psi\u003c\/td\u003e\n\u003ctd\u003e116 psi\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNoise\u003c\/td\u003e\n\u003ctd\u003e44 dB(A)\u003c\/td\u003e\n\u003ctd\u003eQuiet\u003c\/td\u003e\n\u003ctd\u003e~43 dB(A)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSelf-priming\u003c\/td\u003e\n\u003ctd\u003e26 ft\u003c\/td\u003e\n\u003ctd\u003e26 ft\u003c\/td\u003e\n\u003ctd\u003e26 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMulti-pump\u003c\/td\u003e\n\u003ctd\u003eParallel twin kit\u003c\/td\u003e\n\u003ctd\u003eTwin (Esytwin Mini)\u003c\/td\u003e\n\u003ctd\u003eWireless to 4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertifications\u003c\/td\u003e\n\u003ctd\u003eNSF 61\/372, cULus, WRAS\u003c\/td\u003e\n\u003ctd\u003eNSF 61\/372, UL, CSA\u003c\/td\u003e\n\u003ctd\u003eNSF 61\/372, UL, CSA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\n\u003cp class=\"sc-note\"\u003eEsybox offers more flow and head per unit and wireless multi-pump grouping; SCALA2 counters with a higher system-pressure rating and higher chloride tolerance. For higher flow or a commercial station, step to DAB Esybox or Esybox Max.\u003c\/p\u003e\n\n\u003ch3 class=\"sc-h3\"\u003eGrundfos SCALA vs A.Y. McDonald DuraMAC\u003c\/h3\u003e\n\u003cdiv class=\"sc-tw\"\u003e\u003ctable class=\"sc-t\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eSCALA1\u003c\/th\u003e\n\u003cth\u003eSCALA2\u003c\/th\u003e\n\u003cth\u003eDuraMAC Residential\u003c\/th\u003e\n\u003cth\u003eDuraMAC VS\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eControl\u003c\/td\u003e\n\u003ctd\u003eFixed speed\u003c\/td\u003e\n\u003ctd\u003eVariable speed\u003c\/td\u003e\n\u003ctd\u003eFixed speed\u003c\/td\u003e\n\u003ctd\u003eVariable speed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFlow\u003c\/td\u003e\n\u003ctd\u003e13-22 GPM\u003c\/td\u003e\n\u003ctd\u003eup to 18 GPM\u003c\/td\u003e\n\u003ctd\u003e20 GPM\u003c\/td\u003e\n\u003ctd\u003e6-35 GPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBoost \/ head\u003c\/td\u003e\n\u003ctd\u003e150-180 ft\u003c\/td\u003e\n\u003ctd\u003e147 ft\u003c\/td\u003e\n\u003ctd\u003e35-70 psi\u003c\/td\u003e\n\u003ctd\u003e25-65 psi\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMotor\u003c\/td\u003e\n\u003ctd\u003e0.8-1.1 HP (P2)\u003c\/td\u003e\n\u003ctd\u003e3\/4 HP (P1)\u003c\/td\u003e\n\u003ctd\u003e1\/2-1 HP\u003c\/td\u003e\n\u003ctd\u003e1-2 HP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax system pressure\u003c\/td\u003e\n\u003ctd\u003e116 psi\u003c\/td\u003e\n\u003ctd\u003e145 psi\u003c\/td\u003e\n\u003ctd\u003e—\u003c\/td\u003e\n\u003ctd\u003e120 psi\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConstruction\u003c\/td\u003e\n\u003ctd\u003eComposite\u003c\/td\u003e\n\u003ctd\u003eAl + composite\u003c\/td\u003e\n\u003ctd\u003eStainless components\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"sc-hl\"\u003eSS 304\/316\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSelf-priming\u003c\/td\u003e\n\u003ctd\u003e26 ft\u003c\/td\u003e\n\u003ctd\u003e26 ft\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertifications\u003c\/td\u003e\n\u003ctd\u003eNSF 61\/372\u003c\/td\u003e\n\u003ctd\u003eNSF 61\/372\u003c\/td\u003e\n\u003ctd\u003eNSF 61\u003c\/td\u003e\n\u003ctd\u003eNSF 61, UL\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eDenmark\/Serbia\u003c\/td\u003e\n\u003ctd\u003eDenmark\/Serbia\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"sc-hl\"\u003eMade in USA\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"sc-hl\"\u003eMade in USA\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\n\u003cp class=\"sc-note\"\u003eDuraMAC VS offers more flow and full stainless-steel hydraulics with domestic manufacture; SCALA2 counters with quieter operation, a higher system-pressure rating and NSF 372. SCALA1 and DuraMAC Residential are the fixed-speed options in each line.\u003c\/p\u003e\n\n\u003ch3 class=\"sc-h3\"\u003eGrundfos SCALA vs Goulds Water Technology\u003c\/h3\u003e\n\u003cdiv class=\"sc-tw\"\u003e\u003ctable class=\"sc-t\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eSCALA2\u003c\/th\u003e\n\u003cth\u003eGoulds ResiBoost\u003c\/th\u003e\n\u003cth\u003eGoulds Aquavar\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eControl\u003c\/td\u003e\n\u003ctd\u003eVariable speed\u003c\/td\u003e\n\u003ctd\u003eVariable speed (VSD)\u003c\/td\u003e\n\u003ctd\u003eVariable speed (e-AB3 \/ e-AB2)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax flow\u003c\/td\u003e\n\u003ctd\u003eup to 18 GPM\u003c\/td\u003e\n\u003ctd\u003eup to 35 GPM\u003c\/td\u003e\n\u003ctd\u003eup to 80 GPM (e-AB2)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMotor\u003c\/td\u003e\n\u003ctd\u003e3\/4 HP\u003c\/td\u003e\n\u003ctd\u003e0.75-2 HP\u003c\/td\u003e\n\u003ctd\u003e0.5-5 HP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePump \/ motor\u003c\/td\u003e\n\u003ctd\u003eAl + composite\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"sc-hl\"\u003eStainless e-HM\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eIE5 Smart Motor \/ e-HM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSelf-priming\u003c\/td\u003e\n\u003ctd\u003e26 ft\u003c\/td\u003e\n\u003ctd\u003eNot self-priming\u003c\/td\u003e\n\u003ctd\u003eNot self-priming\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIntegrated tank\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eYes (packed separate)\u003c\/td\u003e\n\u003ctd\u003eYes (kit)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInstall rating\u003c\/td\u003e\n\u003ctd\u003eIPX4D outdoor\u003c\/td\u003e\n\u003ctd\u003eIndoor\u003c\/td\u003e\n\u003ctd\u003eNEMA 1 \/ NEMA 3R\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertifications\u003c\/td\u003e\n\u003ctd\u003eNSF 61\/372, cULus, WRAS\u003c\/td\u003e\n\u003ctd\u003eNSF 61\/372 (Xylem)\u003c\/td\u003e\n\u003ctd\u003eNSF 61\/372 (Xylem)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\n\u003cp class=\"sc-note\"\u003eGoulds ResiBoost and Aquavar scale to higher flow and horsepower with stainless e-HM hydraulics, and Aquavar reaches commercial duty. SCALA2 is the more compact, self-priming, plug-and-pump choice for single-residence constant pressure.\u003c\/p\u003e\n\n\u003ch3 class=\"sc-h3\"\u003eGrundfos SCALA vs Davey\u003c\/h3\u003e\n\u003cdiv class=\"sc-tw\"\u003e\u003ctable class=\"sc-t\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eSCALA2\u003c\/th\u003e\n\u003cth\u003eDavey DD Series\u003c\/th\u003e\n\u003cth\u003eDavey EvoDrive\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eControl\u003c\/td\u003e\n\u003ctd\u003eVariable speed\u003c\/td\u003e\n\u003ctd\u003eVariable speed\u003c\/td\u003e\n\u003ctd\u003eVariable speed (PM motor)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax flow\u003c\/td\u003e\n\u003ctd\u003eup to 18 GPM\u003c\/td\u003e\n\u003ctd\u003e15-34 GPM\u003c\/td\u003e\n\u003ctd\u003e28 GPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax pressure\u003c\/td\u003e\n\u003ctd\u003e147 ft (~64 psi)\u003c\/td\u003e\n\u003ctd\u003eup to 91 psi set\u003c\/td\u003e\n\u003ctd\u003eup to 95 psi\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax casing pressure\u003c\/td\u003e\n\u003ctd\u003e145 psi\u003c\/td\u003e\n\u003ctd\u003e116-145 psi\u003c\/td\u003e\n\u003ctd\u003e145 psi\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSelf-priming lift\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"sc-hl\"\u003e26 ft\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eFlooded \/ limited\u003c\/td\u003e\n\u003ctd\u003e13 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConstruction\u003c\/td\u003e\n\u003ctd\u003eAl + composite\u003c\/td\u003e\n\u003ctd\u003e304 stainless\u003c\/td\u003e\n\u003ctd\u003e304 stainless\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMulti-pump\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003ctd\u003eDaisy-chain 2 pumps\u003c\/td\u003e\n\u003ctd\u003eDuty\/standby (2 pumps)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertifications\u003c\/td\u003e\n\u003ctd\u003eNSF 61\/372\u003c\/td\u003e\n\u003ctd\u003eNSF 61 (WQA)\u003c\/td\u003e\n\u003ctd\u003eNSF-oriented\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\n\u003cp class=\"sc-note\"\u003eDavey DD and EvoDrive offer more flow and stainless hydraulics with dual-pump modes; SCALA2 counters with greater self-priming lift (26 ft vs 13 ft on EvoDrive) and NSF 372 low-lead certification.\u003c\/p\u003e\n\n\u003ch3 class=\"sc-h3\"\u003eGrundfos SCALA vs Franklin Electric\u003c\/h3\u003e\n\u003cdiv class=\"sc-tw\"\u003e\u003ctable class=\"sc-t\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eSCALA2\u003c\/th\u003e\n\u003cth\u003eFE VersaBoost Pro\u003c\/th\u003e\n\u003cth\u003eFE MH Series\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003eVFD constant pressure\u003c\/td\u003e\n\u003ctd\u003eVFD constant pressure\u003c\/td\u003e\n\u003ctd\u003eMulti-stage (bare pump)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax flow\u003c\/td\u003e\n\u003ctd\u003eup to 18 GPM\u003c\/td\u003e\n\u003ctd\u003e18-25 GPM\u003c\/td\u003e\n\u003ctd\u003e15-90 GPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMotor\u003c\/td\u003e\n\u003ctd\u003e3\/4 HP\u003c\/td\u003e\n\u003ctd\u003e0.8-1.1 HP\u003c\/td\u003e\n\u003ctd\u003e1\/2-7.5 HP, 1 \u0026amp; 3-phase\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSelf-priming\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"sc-hl\"\u003e26 ft\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003eNo (submersible-based)\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIntegrated tank \/ CV\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eNo (external drive\/tank)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNoise\u003c\/td\u003e\n\u003ctd\u003e44 dB(A)\u003c\/td\u003e\n\u003ctd\u003e45 dB(A)\u003c\/td\u003e\n\u003ctd\u003e—\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInstall rating\u003c\/td\u003e\n\u003ctd\u003eIPX4D outdoor\u003c\/td\u003e\n\u003ctd\u003eNEMA 3R\u003c\/td\u003e\n\u003ctd\u003eIndoor\/outdoor motor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertifications\u003c\/td\u003e\n\u003ctd\u003eNSF 61\/372, cULus, WRAS\u003c\/td\u003e\n\u003ctd\u003eNSF 61\/372, UL, CSA\u003c\/td\u003e\n\u003ctd\u003eNSF 372, UL, CSA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\n\u003cp class=\"sc-note\"\u003eVersaBoost Pro is the closest Franklin match to SCALA2 — a comparable all-in-one VFD system built on an encapsulated submersible motor, though not self-priming. MH Series is a bare multistage pump for building a custom booster and scales to far higher flow. For duplex\/triplex commercial stations, Franklin’s Inline SpecPAK sits above the SCALA class.\u003c\/p\u003e\n\u003c\/section\u003e\n\n\u003csection class=\"sc-sec alt\" id=\"sc-acc\"\u003e\u003cdiv class=\"sc-in\"\u003e\n\u003ch2 class=\"sc-h2\"\u003eSCALA Accessories\u003c\/h2\u003e\n\u003cp class=\"sc-sub\"\u003eFactory accessories that complete a SCALA installation. Order with the pump so the job ships together — product pages linked as they publish.\u003c\/p\u003e\n\u003cdiv class=\"sc-acc\"\u003e\n\u003cdiv class=\"sc-acc-item\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0264\/1913\/4527\/files\/Grundros_Scala_2_inlet_filter_accessory.webp?v=1788620714\" alt=\"Grundfos SCALA inlet filter 250 micron\" loading=\"lazy\"\u003e\u003ch4\u003eInlet Filter\u003c\/h4\u003e\n\u003cp\u003e250-micron NPT filter that protects the pump from sand and debris on well and tank feeds.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sc-acc-item\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0264\/1913\/4527\/files\/Grundros_Scala_2_twin_accessory_set.webp?v=1788620714\" alt=\"Grundfos SCALA1 twin accessory set\" loading=\"lazy\"\u003e\u003ch4\u003eTwin Accessory Set\u003c\/h4\u003e\n\u003cp\u003eBase plate, inlet\/outlet manifolds with valves and comms cable to build a SCALA1 twin booster.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sc-acc-item\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0264\/1913\/4527\/files\/Grundros_Scala_2_flexible_hose.webp?v=1788620714\" alt=\"Grundfos SCALA flexible hose set\" loading=\"lazy\"\u003e\u003ch4\u003eFlexible Hose Set\u003c\/h4\u003e\n\u003cp\u003eWRAS-approved braided connection hoses for vibration isolation and easy service.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sc-acc-item\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0264\/1913\/4527\/files\/Grundros_Scala_2_base_plate.webp?v=1788620714\" alt=\"Grundfos SCALA pump stand base plate\" loading=\"lazy\"\u003e\u003ch4\u003ePump Stand\u003c\/h4\u003e\n\u003cp\u003eEPP stand that supports the pump, cuts vibration and noise, and lifts vents clear of drips.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sc-acc-item\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0264\/1913\/4527\/files\/Grundros_Scala_2_locking_pin.webp?v=1788620714\" alt=\"Grundfos SCALA2 locking pin\" loading=\"lazy\"\u003e\u003ch4\u003eLocking Pin (SCALA2)\u003c\/h4\u003e\n\u003cp\u003eStops the clicking noise under positive inlet pressure; remove to restore self-priming.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp class=\"sc-note\"\u003eGenuine Grundfos spare parts and service kits are available by model; contact us with the pump type and serial for the correct part.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e\n\n\u003cdiv class=\"sc-why\"\u003e\n\u003cdiv class=\"sc-why-inner\"\u003e\n\u003ch2\u003eWhy Source Grundfos SCALA from Watermain Supply\u003c\/h2\u003e\n\u003cdiv class=\"sc-why-grid\"\u003e\n\u003cdiv class=\"sc-why-item\"\u003e\n\u003ch4\u003eGulf Coast Stock\u003c\/h4\u003e\n\u003cp\u003eSCALA1 and SCALA2 in U.S. 60 Hz configurations ship fast across Texas and the Gulf Coast.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sc-why-item\"\u003e\n\u003ch4\u003eEngineering-Led Sizing\u003c\/h4\u003e\n\u003cp\u003eWe size from fixture count, elevation, inlet pressure and pipe friction against the manufacturer curve — and tell you when a smaller model will do.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sc-why-item\"\u003e\n\u003ch4\u003eMulti-Brand Perspective\u003c\/h4\u003e\n\u003cp\u003eWe also stock DAB, A.Y. McDonald DuraMAC, Goulds, Davey and Franklin Electric. If SCALA is not the right fit, we will say so and quote the one that is.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sc-why-item\"\u003e\n\u003ch4\u003eTwin \u0026amp; Standby Design\u003c\/h4\u003e\n\u003cp\u003eGuidance on SCALA1 twin boosters for standby redundancy or higher peak flow, with the right accessory kit and controls.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sc-why-item\"\u003e\n\u003ch4\u003eAccount Terms Available\u003c\/h4\u003e\n\u003cp\u003eNet-30 terms for qualified contractor, property-management and municipal accounts, handled in-house.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sc-why-item\"\u003e\n\u003ch4\u003eParts \u0026amp; Aftermarket\u003c\/h4\u003e\n\u003cp\u003eGenuine Grundfos accessories and service parts with model cross-reference, so you get the right kit the first time.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003csection class=\"sc-sec\" id=\"sc-faq\"\u003e\n\u003ch2 class=\"sc-h2\"\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp class=\"sc-sub\"\u003eCommon questions from homeowners, plumbers and engineers selecting a Grundfos SCALA booster.\u003c\/p\u003e\n\u003cdiv class=\"sc-faq\"\u003e\n\u003cdiv class=\"sc-faq-item\"\u003e\n\u003ch4\u003eWhat is the difference between SCALA1 and SCALA2?\u003c\/h4\u003e\n\u003cp\u003eSCALA1 is a fixed-speed booster available in two models (3-45 and 5-55), with Bluetooth, an external input for float or irrigation control, and the ability to pair two units into a twin booster. SCALA2 is a single-model variable-speed unit that holds constant pressure at every tap, runs quieter at 44 dB(A), and carries a higher 145 psi system-pressure rating. Choose SCALA2 for steady whole-home pressure, SCALA1 for irrigation control, wider flow range, or twin redundancy.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sc-faq-item\"\u003e\n\u003ch4\u003eDo I need a separate pressure tank with a SCALA?\u003c\/h4\u003e\n\u003cp\u003eNo. Both systems include an integrated vessel and check valve. SCALA2 has a diaphragm tank sized for its VFD control logic, and SCALA1 has a small vessel with anti-cycling logic. An external tank is not required for normal installations.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sc-faq-item\"\u003e\n\u003ch4\u003eCan a SCALA run on both 115 V and 230 V?\u003c\/h4\u003e\n\u003cp\u003eEach variant ships for a specific supply: 115 V uses a NEMA 5-15 plug, 230 V a NEMA 6-15 plug. Select the voltage that matches your service when ordering. Both are single-phase, 60 Hz.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sc-faq-item\"\u003e\n\u003ch4\u003eHow much boost does a SCALA provide?\u003c\/h4\u003e\n\u003cp\u003eHead in feet converts to pressure at 0.433 psi per foot. SCALA1 delivers up to 150 ft (about 65 psi) on the 3-45 and 180 ft (about 78 psi) on the 5-55; SCALA2 holds an adjustable set point up to 147 ft (about 64 psi). Available boost falls as flow rises — size with margin.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sc-faq-item\"\u003e\n\u003ch4\u003eCan a SCALA draw water from a tank or shallow well?\u003c\/h4\u003e\n\u003cp\u003eYes. Both SCALA1 and SCALA2 are self-priming to 26 ft of suction lift, so they can pull from an atmospheric storage tank, cistern or shallow well. We recommend the 250-micron inlet filter on well and tank feeds to protect the pump.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sc-faq-item\"\u003e\n\u003ch4\u003eCan I run two SCALA pumps together?\u003c\/h4\u003e\n\u003cp\u003eSCALA1 is twin-capable: two units mount on the twin accessory kit, communicate over a cable, and alternate duty by runtime or number of starts, staging the second pump in as demand rises. SCALA2 offers a parallel twin accessory set (base plate, manifolds, valves) so two units can share one installation, but the pumps run independently — the communication cable, alternation and staging logic are SCALA1-only.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sc-faq-item\"\u003e\n\u003ch4\u003eIs SCALA a good choice for hard or chlorinated water?\u003c\/h4\u003e\n\u003cp\u003eSCALA2 tolerates pH 4-9 and chloride up to 300 ppm, six times SCALA1’s limit, which suits harder or more chlorinated municipal feeds. For water with sand or grit, add the inlet filter regardless of model.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sc-faq-item\"\u003e\n\u003ch4\u003eIs SCALA certified for drinking water?\u003c\/h4\u003e\n\u003cp\u003eYes. Both systems are certified to NSF\/ANSI 61 for drinking-water system components and NSF\/ANSI 372 for low lead content. SCALA2 additionally carries UL, CSA and WRAS.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sc-faq-item\"\u003e\n\u003ch4\u003eHow does SCALA compare to DAB, Goulds, Davey or Franklin?\u003c\/h4\u003e\n\u003cp\u003eMost residential VFD boosters — DAB Esybox, Goulds ResiBoost, Davey DD\/EvoDrive, Franklin VersaBoost — compare directly with SCALA2. Several offer more flow or stainless hydraulics; SCALA2 counters with a higher system-pressure rating, 26 ft self-priming, low noise and NSF 372. See the comparison tables above, or call us for a straight recommendation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sc-faq-item\"\u003e\n\u003ch4\u003eCan I install a SCALA outdoors?\u003c\/h4\u003e\n\u003cp\u003eBoth carry an IPX4D rating suitable for outdoor installation; mount on a stand to keep the ventilation clear of standing water and provide freeze protection in cold climates. Keep 1.6 ft (0.5 m) of clearance on three sides.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\n\u003cdiv class=\"sc-cta\"\u003e\n\u003ch2\u003eReady to Size Your Booster?\u003c\/h2\u003e\n\u003cp\u003eSend us your fixture count, number of floors, inlet pressure and required flow. We will respond with a sized SCALA selection, the accessories you need, and lead time.\u003c\/p\u003e\n\u003cdiv class=\"sc-cta-row\"\u003e\n\u003cspan class=\"sc-phone\"\u003e1-888.510.4036\u003c\/span\u003e\n\u003ca class=\"sc-btn\" href=\"mailto:sales@watermainsupply.com\"\u003eEmail sales@watermainsupply.com\u003c\/a\u003e\n\u003ca class=\"sc-btn sc-btn-out\" href=\"\/pages\/request-a-quote\"\u003eRequest a Quote\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"sc-foot\"\u003eTechnical data on this page is taken from Grundfos SCALA U.S. 60 Hz product literature and is subject to change by the manufacturer. Confirm against the current installation manual and pump curve before specifying.\u003cbr\u003e\nGrundfos, SCALA, SCALA1, SCALA2 and Grundfos GO are trademarks of Grundfos Holding A\/S, used here for product identification only. DAB, Esybox, DuraMAC, Goulds, ResiBoost, Aquavar, Davey, EvoDrive, Franklin Electric and VersaBoost are trademarks of their respective owners.\u003cbr\u003e\nWatermain Supply is a DBA of E4 Industrial LLC, an independent industrial supplier based in Houston, Texas.\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[\n{\"@type\":\"Question\",\"name\":\"What is the difference between SCALA1 and SCALA2?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"SCALA1 is a fixed-speed booster in two models (3-45 and 5-55) with Bluetooth, an external input, and twin-pump capability. SCALA2 is a single-model variable-speed unit that holds constant pressure, runs quieter at 44 dB(A), and carries a 145 psi system-pressure rating. Choose SCALA2 for steady whole-home pressure, SCALA1 for irrigation control, wider flow range, or twin redundancy.\"}},\n{\"@type\":\"Question\",\"name\":\"Do I need a separate pressure tank with a SCALA?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"No. Both systems include an integrated vessel and check valve. SCALA2 has a diaphragm tank sized for its VFD control; SCALA1 has a small vessel with anti-cycling logic. An external tank is not required for normal installations.\"}},\n{\"@type\":\"Question\",\"name\":\"Can a SCALA run on both 115 V and 230 V?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Each variant ships for a specific supply: 115 V uses a NEMA 5-15 plug and 230 V a NEMA 6-15 plug. Select the voltage that matches your service when ordering. Both are single-phase, 60 Hz.\"}},\n{\"@type\":\"Question\",\"name\":\"Can a SCALA draw water from a tank or shallow well?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes. Both SCALA1 and SCALA2 are self-priming to 26 ft of suction lift, so they can pull from an atmospheric storage tank, cistern or shallow well. A 250-micron inlet filter is recommended on well and tank feeds.\"}},\n{\"@type\":\"Question\",\"name\":\"Can I run two SCALA pumps together?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"SCALA1 is twin-capable: two units mount on a twin accessory kit, communicate over a cable, and alternate duty by runtime or number of starts, staging the second pump in as demand rises. SCALA2 offers a parallel twin accessory set so two units can share one installation, but the pumps run independently - the communication cable, alternation and staging logic are SCALA1-only.\"}},\n{\"@type\":\"Question\",\"name\":\"Is SCALA certified for drinking water?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes. Both systems are certified to NSF\/ANSI 61 and NSF\/ANSI 372. SCALA2 additionally carries UL, CSA and WRAS.\"}},\n{\"@type\":\"Question\",\"name\":\"How does SCALA compare to DAB, Goulds, Davey or Franklin?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"DAB Esybox, Goulds ResiBoost, Davey DD and EvoDrive, and Franklin VersaBoost are all residential VFD boosters that compare directly with SCALA2. Several offer more flow or stainless hydraulics; SCALA2 counters with a higher system-pressure rating, 26 ft self-priming, low noise, and NSF 372 certification.\"}}\n]}\n\u003c\/script\u003e\n","products":[{"product_id":"grundfos-scala1-self-priming-pressure-booster-pump","title":"Grundfos SCALA1 Self-Priming Pressure Booster Pump - 115\/230V, 13-22 GPM, 150-180 ft Head","description":"\u003c!-- TABS --\u003e\n\u003ch5\u003eDescription\u003c\/h5\u003e\n\u003cstyle\u003e\n.gs,.gs *{box-sizing:border-box;margin:0;padding:0}\n.gs{--c1:#B3122A;--g1:#4A4A4F;--s1:#9B9EA3;--a1:#E1E3E6;--k1:#C7CBD1;--d1:#B8BDC4;--w:#FFFFFF;font-family:Arial,Helvetica,sans-serif;color:var(--g1);font-size:15px;line-height:1.6;max-width:960px;margin:0 auto}\n.gs-head{background:var(--g1);color:var(--w);padding:22px 26px;border-left:5px solid var(--c1)}\n.gs-eyebrow{font-size:11px;font-weight:700;letter-spacing:.11em;text-transform:uppercase;color:var(--c1);margin-bottom:6px}\n.gs-title{font-family:\"Arial 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Black\",Arial,sans-serif;font-size:10px;font-weight:900;text-transform:uppercase;letter-spacing:.06em;text-align:left;padding:9px 12px;border-bottom:2px solid var(--c1)}\n.gs .gs-tbl td{padding:8px 12px;border-bottom:1px solid var(--a1);vertical-align:top}\n.gs .gs-tbl tr:last-child td{border-bottom:none}\n.gs .gs-tbl td:first-child{font-weight:700;color:var(--g1);width:34%}\n.gs .gs-tbl tr:nth-child(even) td{background:#f7f7f8}\n.gs-apps{list-style:none;display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:6px 18px;font-size:13px}\n.gs-apps li{padding-left:16px;position:relative}\n.gs-apps li::before{content:\"\";position:absolute;left:0;top:8px;width:6px;height:6px;background:var(--c1);border-radius:1px}\n.gs-note{background:#fff8f8;border:1px solid #f0c0c6;border-left:4px solid var(--c1);padding:14px 18px;font-size:13px;line-height:1.65;border-radius:0 2px 2px 0;margin-top:22px}\n.gs-note b{color:var(--c1);text-transform:uppercase;letter-spacing:.05em;font-size:11px;display:block;margin-bottom:4px;font-family:\"Arial Black\",Arial,sans-serif}\n.gs-contact{margin-top:18px;padding-top:14px;border-top:1px solid var(--a1);font-size:12px;color:var(--s1)}\n.gs-contact a{color:var(--c1);font-weight:700;text-decoration:none}\n.gs-dl{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:10px}\n.gs-dl a{display:flex;align-items:center;gap:9px;background:var(--a1);border-top:2px solid var(--d1);padding:12px 14px;font-size:12px;font-weight:700;color:var(--g1);text-decoration:none;line-height:1.35;transition:border-color .15s,background .15s}\n.gs-dl a:hover{border-top-color:var(--c1);background:var(--w)}\n.gs-dl a::before{content:\"⇩\";color:var(--c1);font-size:15px;font-weight:900;flex-shrink:0}\n\u003c\/style\u003e\n\u003cdiv class=\"gs\"\u003e\n\u003cdiv class=\"gs-head\"\u003e\n\u003cdiv class=\"gs-eyebrow\"\u003eGrundfos · Self-Priming Booster\u003c\/div\u003e\n\u003cdiv class=\"gs-title\"\u003eSCALA1 Pressure Booster Pump\u003c\/div\u003e\n\u003cdiv class=\"gs-sub\"\u003eAll-in-one, self-priming multistage booster that delivers water on demand from city mains, storage or roof tanks, and shallow wells — pump, motor, tank, check valve and controls in one compact enclosure.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"gs-badges\"\u003e\n\u003cdiv class=\"gs-badge\"\u003e115V \/ 230V\u003c\/div\u003e\n\u003cdiv class=\"gs-badge\"\u003e13–22 GPM\u003c\/div\u003e\n\u003cdiv class=\"gs-badge\"\u003eUp to 180 ft Head\u003c\/div\u003e\n\u003cdiv class=\"gs-badge\"\u003eSelf-Priming · 26 ft Lift\u003c\/div\u003e\n\u003cdiv class=\"gs-badge\"\u003eTwin-Capable\u003c\/div\u003e\n\u003cdiv class=\"gs-badge\"\u003eNSF\/ANSI 61 + 372\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#E1E3E6;border-left:3px solid #B8BDC4;padding:8px 14px;font-size:11.5px;color:#4A4A4F;margin-top:14px;line-height:1.5\"\u003eGenuine Grundfos equipment, factory-new in original packaging — sold and supported by Watermain Supply, an independent industrial distributor.\u003c\/div\u003e\n\u003cdiv class=\"gs-sec\"\u003e\n\u003cdiv class=\"gs-h\"\u003eOverview\u003c\/div\u003e\n\u003cdiv class=\"gs-lead\"\u003e\n\u003cp\u003eThe Grundfos SCALA1 is a fully integrated, self-priming pressure booster that combines a multistage pump, water-cooled motor, small pressure vessel, check valve and electronic controls in one corrosion-resistant composite enclosure. It provides steady water on demand for homes, cabins and light-commercial supply.\u003c\/p\u003e\n\u003cp\u003eFixed-speed operation with built-in dry-running, anti-cycling and maximum-runtime protection. Bluetooth (Grundfos GO) and an external input add float-switch and irrigation control, and two units pair into a twin booster for standby duty or higher flow. Runs under 55 dB(A). Ports are 1 in NPT on both suction and discharge.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"gs-sec\"\u003e\n\u003cdiv class=\"gs-h\"\u003eSpecifications by Model\u003c\/div\u003e\n\u003cdiv class=\"table-wrapper\"\u003e\u003ctable class=\"gs-tbl\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eSCALA1 3-45\u003c\/th\u003e\n\u003cth\u003eSCALA1 5-55\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eNominal Flow\u003c\/td\u003e\n\u003ctd\u003e13 GPM (3 m³\/h)\u003c\/td\u003e\n\u003ctd\u003e22 GPM (5 m³\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNominal Duty Point\u003c\/td\u003e\n\u003ctd\u003e15.8 GPM at 82 ft\u003c\/td\u003e\n\u003ctd\u003e23.5 GPM at 82 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Head (60 Hz)\u003c\/td\u003e\n\u003ctd\u003e150 ft (46 m)\u003c\/td\u003e\n\u003ctd\u003e180 ft (55 m)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMotor Output (P2)\u003c\/td\u003e\n\u003ctd\u003e0.80 HP\u003c\/td\u003e\n\u003ctd\u003e1.10 HP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Power Input (P1)\u003c\/td\u003e\n\u003ctd\u003e1.28 HP (950 W)\u003c\/td\u003e\n\u003ctd\u003e1.68 HP (1250 W)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupply Voltage\u003c\/td\u003e\n\u003ctd\u003e115V or 230V, 1-phase, 60 Hz\u003c\/td\u003e\n\u003ctd\u003e115V or 230V, 1-phase, 60 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Inlet Pressure\u003c\/td\u003e\n\u003ctd\u003e43 psi (3 bar)\u003c\/td\u003e\n\u003ctd\u003e29 psi (2 bar)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax System Pressure\u003c\/td\u003e\n\u003ctd\u003e116 psi (8 bar)\u003c\/td\u003e\n\u003ctd\u003e116 psi (8 bar)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Suction Lift\u003c\/td\u003e\n\u003ctd\u003e26 ft (8 m)\u003c\/td\u003e\n\u003ctd\u003e26 ft (8 m)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePorts\u003c\/td\u003e\n\u003ctd\u003e1 in NPT suction and discharge\u003c\/td\u003e\n\u003ctd\u003e1 in NPT suction and discharge\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNoise Level\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 55 dB(A)\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 55 dB(A)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Ambient \/ Liquid Temp\u003c\/td\u003e\n\u003ctd\u003e131°F \/ 113°F\u003c\/td\u003e\n\u003ctd\u003e131°F \/ 113°F\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEnclosure\u003c\/td\u003e\n\u003ctd\u003eComposite\u003c\/td\u003e\n\u003ctd\u003eComposite\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIP Rating\u003c\/td\u003e\n\u003ctd\u003eIPX4D\u003c\/td\u003e\n\u003ctd\u003eIPX4D\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTwin Booster\u003c\/td\u003e\n\u003ctd\u003eYes (accessory kit)\u003c\/td\u003e\n\u003ctd\u003eYes (accessory kit)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertifications\u003c\/td\u003e\n\u003ctd\u003eNSF\/ANSI 61 + 372, CSA, CE\u003c\/td\u003e\n\u003ctd\u003eNSF\/ANSI 61 + 372, CSA, CE\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"gs-sec\"\u003e\n\u003cdiv class=\"gs-h\"\u003eApplications\u003c\/div\u003e\n\u003cul class=\"gs-apps\"\u003e\n\u003cli\u003eCity mains pressure boosting\u003c\/li\u003e\n\u003cli\u003eRoof, break and storage tank boosting\u003c\/li\u003e\n\u003cli\u003eShallow wells to 26 ft lift\u003c\/li\u003e\n\u003cli\u003eGarden irrigation (calendar \/ external input)\u003c\/li\u003e\n\u003cli\u003eWater transfer point-to-point\u003c\/li\u003e\n\u003cli\u003eLight-commercial and multi-fixture supply\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"gs-sec\"\u003e\n\u003cdiv class=\"gs-h\"\u003eProtection\u003c\/div\u003e\n\u003cdiv class=\"gs-lead\"\u003e\u003cp\u003eDry-running protection, anti-cycling \/ micro-leakage detection, adjustable maximum-runtime timer and current- and temperature-dependent motor protection with automatic restart — no external motor protection required.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"gs-note\"\u003e\n\u003cb\u003eSelection \u0026amp; Sizing\u003c\/b\u003eThe 3-45 and 5-55 differ in flow, head and inlet-pressure limits; confirm your available inlet pressure before choosing 5-55 (29 psi max). Match voltage to your service — 115V uses a NEMA 5-15 plug, 230V a NEMA 6-15.\u003c\/div\u003e\n\u003cdiv class=\"gs-contact\"\u003eFor engineering-led sizing and selection support or a factory submittal, email \u003ca href=\"mailto:sales@watermainsupply.com\"\u003esales@watermainsupply.com\u003c\/a\u003e or call \u003ca href=\"tel:18885104036\"\u003e1-888.510.4036\u003c\/a\u003e.\u003cbr\u003e© Watermain Supply — A division of E4 Industrial LLC\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch5\u003eData Sheet\u003c\/h5\u003e\n\u003cdiv class=\"gs\"\u003e\n\u003cdiv class=\"gs-dl\"\u003e\n\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0264\/1913\/4527\/files\/99735528_03_2026_SCALA1_IO_US_online.pdf?v=1788621088\" target=\"_blank\" rel=\"noopener\"\u003eSCALA1 Installation \u0026amp; Operating (US)\u003c\/a\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0264\/1913\/4527\/files\/99735562_07.2026__SCALA_Databooklet_online.pdf?v=1788621088\" target=\"_blank\" rel=\"noopener\"\u003eSCALA Data Booklet\u003c\/a\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0264\/1913\/4527\/files\/99735558_03.2023_SCALA1_QG.pdf?v=1788621088\" target=\"_blank\" rel=\"noopener\"\u003eSCALA1 Quick Guide\u003c\/a\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0264\/1913\/4527\/files\/DN001481-Leaflet-Design-SCALA1-GCA-English.pdf?v=1788621087\" target=\"_blank\" rel=\"noopener\"\u003eSCALA1 Design Leaflet\u003c\/a\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0264\/1913\/4527\/files\/99743333_1119_SCALA1_Twin_connection_QG.pdf?v=1788621088\" target=\"_blank\" rel=\"noopener\"\u003eSCALA1 Twin Connection Guide\u003c\/a\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0264\/1913\/4527\/files\/99830441_1020_SCALA1_SI.pdf?v=1788621088\" target=\"_blank\" rel=\"noopener\"\u003eSCALA1 Service Instructions\u003c\/a\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0264\/1913\/4527\/files\/99735560_05.2025_SCALA_Filter_QG.pdf?v=1788621087\" target=\"_blank\" rel=\"noopener\"\u003eInlet Filter Quick Guide\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003ch5\u003eVideos\u003c\/h5\u003e\n\u003cdiv class=\"gs\"\u003e\n\u003cdiv class=\"gs-sec\" style=\"margin-top:6px\"\u003e\n\u003cdiv class=\"gs-h\"\u003eInstallation \u0026amp; Setup\u003c\/div\u003e\n\u003cdiv style=\"display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:20px;margin-top:4px\"\u003e\n\u003cdiv\u003e\n\u003cdiv style=\"position:relative;padding-top:56.25%;background:#E1E3E6\"\u003e\u003ciframe src=\"https:\/\/www.youtube.com\/embed\/tWbMT1AXXp8?rel=0\" title=\"Creating a SCALA1 TWIN Setup\" loading=\"lazy\" style=\"position:absolute;top:0;left:0;width:100%;height:100%;border:0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003cdiv style=\"font-family:Arial Black,Arial,sans-serif;font-size:13px;color:#4A4A4F;margin-top:8px;line-height:1.35\"\u003eCreating a SCALA1 TWIN Setup \u003cspan style=\"color:#9B9EA3;font-family:Arial;font-weight:400\"\u003e· 2:54\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv style=\"position:relative;padding-top:56.25%;background:#E1E3E6\"\u003e\u003ciframe src=\"https:\/\/www.youtube.com\/embed\/mRFYndfir50?rel=0\" title=\"How to Replace a Grundfos MQ with SCALA1\" loading=\"lazy\" style=\"position:absolute;top:0;left:0;width:100%;height:100%;border:0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003cdiv style=\"font-family:Arial Black,Arial,sans-serif;font-size:13px;color:#4A4A4F;margin-top:8px;line-height:1.35\"\u003eHow to Replace a Grundfos MQ with SCALA1 \u003cspan style=\"color:#9B9EA3;font-family:Arial;font-weight:400\"\u003e· 2:21\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"gs-sec\" style=\"margin-top:6px\"\u003e\n\u003cdiv class=\"gs-h\"\u003eService \u0026amp; Repair\u003c\/div\u003e\n\u003cdiv style=\"display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:20px;margin-top:4px\"\u003e\u003cdiv\u003e\n\u003cdiv style=\"position:relative;padding-top:56.25%;background:#E1E3E6\"\u003e\u003ciframe src=\"https:\/\/www.youtube.com\/embed\/7iC35FUB1Nc?rel=0\" title=\"How to Dismantle and Assemble Grundfos SCALA1 Pumps\" loading=\"lazy\" style=\"position:absolute;top:0;left:0;width:100%;height:100%;border:0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003cdiv style=\"font-family:Arial Black,Arial,sans-serif;font-size:13px;color:#4A4A4F;margin-top:8px;line-height:1.35\"\u003eHow to Dismantle and Assemble Grundfos SCALA1 Pumps \u003cspan style=\"color:#9B9EA3;font-family:Arial;font-weight:400\"\u003e· 22:20\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp style=\"font-size:12px;color:#9B9EA3;margin-top:14px\"\u003eVideos are published by Grundfos on its official YouTube channel and open in an embedded player. Content © Grundfos Holding A\/S.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch5\u003eGrundfos GO App\u003c\/h5\u003e\n\u003cdiv class=\"gs\"\u003e\u003cdiv class=\"gs-sec\" style=\"margin-top:6px\"\u003e\n\u003cdiv class=\"gs-h\"\u003eSet Up \u0026amp; Monitor From Your Phone\u003c\/div\u003e\n\u003cdiv class=\"gs-lead\"\u003e\u003cp\u003eThe free Grundfos GO app gives you setup, status overviews, technical product information and live operating parameters from an iOS or Android device. SCALA1 has Bluetooth built in — pair the pump directly with your phone, no extra module needed.\u003c\/p\u003e\u003c\/div\u003e\n\u003cdiv style=\"margin-top:16px\"\u003e\n\u003ca href=\"https:\/\/apps.apple.com\/us\/app\/grundfos-go-remote-pump-tool\/id524685121\" target=\"_blank\" rel=\"noopener\" style=\"display:inline-block;background:#B3122A;color:#fff!important;font-family:Arial Black,Arial,sans-serif;font-size:13px;letter-spacing:1px;text-transform:uppercase;text-decoration:none;padding:12px 24px;border-radius:999px;margin:0 10px 10px 0\"\u003eDownload for iOS\u003c\/a\u003e\u003ca href=\"https:\/\/play.google.com\/store\/apps\/details?id=com.grundfos.go\u0026amp;pcampaignid=web_share\" target=\"_blank\" rel=\"noopener\" style=\"display:inline-block;background:#4A4A4F;color:#fff!important;font-family:Arial Black,Arial,sans-serif;font-size:13px;letter-spacing:1px;text-transform:uppercase;text-decoration:none;padding:12px 24px;border-radius:999px;margin:0 10px 10px 0\"\u003eDownload for Android\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cp style=\"font-size:12px;color:#9B9EA3;margin-top:10px\"\u003eGrundfos GO is a free app from Grundfos Holding A\/S.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/div\u003e\n\u003c!-- \/TABS --\u003e","brand":"Grundfos","offers":[{"title":"SCALA1 3-45 - 13 GPM - 150 ft \/ 115V - NEMA 5-15","offer_id":47450106626223,"sku":"99631742","price":1084.35,"currency_code":"USD","in_stock":true},{"title":"SCALA1 3-45 - 13 GPM - 150 ft \/ 230V - NEMA 6-15","offer_id":47450106658991,"sku":"99631736","price":1084.35,"currency_code":"USD","in_stock":true},{"title":"SCALA1 5-55 - 22 GPM - 180 ft \/ 115V - NEMA 5-15","offer_id":47450106691759,"sku":"99631754","price":1292.53,"currency_code":"USD","in_stock":true},{"title":"SCALA1 5-55 - 22 GPM - 180 ft \/ 230V - NEMA 6-15","offer_id":47450106724527,"sku":"99631739","price":1292.53,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0264\/1913\/4527\/files\/Grundfos_scala_1_5c9765cb-c5e6-44ea-a9f5-03cd8f76aeb7.webp?v=1788622109"},{"product_id":"grundfos-scala2-variable-speed-constant-pressure-booster-pump","title":"Grundfos SCALA2 Variable Speed Constant Pressure Booster Pump - 115\/230V, 13 GPM, 147 ft Head, 3\/4 HP","description":"\u003c!-- TABS --\u003e\n\u003ch5\u003eDescription\u003c\/h5\u003e\n\u003cstyle\u003e\n.gs,.gs *{box-sizing:border-box;margin:0;padding:0}\n.gs{--c1:#B3122A;--g1:#4A4A4F;--s1:#9B9EA3;--a1:#E1E3E6;--k1:#C7CBD1;--d1:#B8BDC4;--w:#FFFFFF;font-family:Arial,Helvetica,sans-serif;color:var(--g1);font-size:15px;line-height:1.6;max-width:960px;margin:0 auto}\n.gs-head{background:var(--g1);color:var(--w);padding:22px 26px;border-left:5px solid var(--c1)}\n.gs-eyebrow{font-size:11px;font-weight:700;letter-spacing:.11em;text-transform:uppercase;color:var(--c1);margin-bottom:6px}\n.gs-title{font-family:\"Arial Black\",Arial,sans-serif;font-size:22px;font-weight:900;text-transform:uppercase;letter-spacing:.01em;line-height:1.15}\n.gs-sub{color:var(--k1);font-size:13px;margin-top:8px;max-width:640px}\n.gs-badges{display:flex;flex-wrap:wrap;gap:7px;margin:16px 0 6px}\n.gs-badge{background:var(--a1);border:1px solid var(--k1);color:var(--g1);font-size:11px;font-weight:700;letter-spacing:.03em;text-transform:uppercase;padding:5px 11px;border-radius:2px}\n.gs-sec{margin-top:26px}\n.gs-h{font-family:\"Arial Black\",Arial,sans-serif;font-size:12px;font-weight:900;letter-spacing:.1em;text-transform:uppercase;color:var(--c1);border-bottom:2px solid var(--a1);padding-bottom:6px;margin-bottom:12px}\n.gs-lead p{margin-bottom:10px}\n.gs-lead p:last-child{margin-bottom:0}\n.gs table{width:100%;border-collapse:collapse;font-size:13px;background:var(--w)}\n.gs .gs-tbl th{background:var(--g1);color:var(--w);font-family:\"Arial Black\",Arial,sans-serif;font-size:10px;font-weight:900;text-transform:uppercase;letter-spacing:.06em;text-align:left;padding:9px 12px;border-bottom:2px solid var(--c1)}\n.gs .gs-tbl td{padding:8px 12px;border-bottom:1px solid var(--a1);vertical-align:top}\n.gs .gs-tbl tr:last-child td{border-bottom:none}\n.gs .gs-tbl td:first-child{font-weight:700;color:var(--g1);width:34%}\n.gs .gs-tbl tr:nth-child(even) td{background:#f7f7f8}\n.gs-apps{list-style:none;display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:6px 18px;font-size:13px}\n.gs-apps li{padding-left:16px;position:relative}\n.gs-apps li::before{content:\"\";position:absolute;left:0;top:8px;width:6px;height:6px;background:var(--c1);border-radius:1px}\n.gs-note{background:#fff8f8;border:1px solid #f0c0c6;border-left:4px solid var(--c1);padding:14px 18px;font-size:13px;line-height:1.65;border-radius:0 2px 2px 0;margin-top:22px}\n.gs-note b{color:var(--c1);text-transform:uppercase;letter-spacing:.05em;font-size:11px;display:block;margin-bottom:4px;font-family:\"Arial Black\",Arial,sans-serif}\n.gs-contact{margin-top:18px;padding-top:14px;border-top:1px solid var(--a1);font-size:12px;color:var(--s1)}\n.gs-contact a{color:var(--c1);font-weight:700;text-decoration:none}\n.gs-dl{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:10px}\n.gs-dl a{display:flex;align-items:center;gap:9px;background:var(--a1);border-top:2px solid var(--d1);padding:12px 14px;font-size:12px;font-weight:700;color:var(--g1);text-decoration:none;line-height:1.35;transition:border-color .15s,background .15s}\n.gs-dl a:hover{border-top-color:var(--c1);background:var(--w)}\n.gs-dl a::before{content:\"⇩\";color:var(--c1);font-size:15px;font-weight:900;flex-shrink:0}\n\u003c\/style\u003e\n\u003cdiv class=\"gs\"\u003e\n\u003cdiv class=\"gs-head\"\u003e\n\u003cdiv class=\"gs-eyebrow\"\u003eGrundfos · Variable-Speed Constant Pressure\u003c\/div\u003e\n\u003cdiv class=\"gs-title\"\u003eSCALA2 Constant Pressure Booster Pump\u003c\/div\u003e\n\u003cdiv class=\"gs-sub\"\u003eFully integrated, variable-speed booster that holds constant pressure at every tap regardless of inlet fluctuation — one of the quietest boosters in its class at 44 dB(A).\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"gs-badges\"\u003e\n\u003cdiv class=\"gs-badge\"\u003e3\/4 HP\u003c\/div\u003e\n\u003cdiv class=\"gs-badge\"\u003eUp to 18 GPM\u003c\/div\u003e\n\u003cdiv class=\"gs-badge\"\u003e147 ft Max Head\u003c\/div\u003e\n\u003cdiv class=\"gs-badge\"\u003eVariable-Speed VFD\u003c\/div\u003e\n\u003cdiv class=\"gs-badge\"\u003e44 dB(A) Quiet\u003c\/div\u003e\n\u003cdiv class=\"gs-badge\"\u003eNSF\/ANSI 61 + 372\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#E1E3E6;border-left:3px solid #B8BDC4;padding:8px 14px;font-size:11.5px;color:#4A4A4F;margin-top:14px;line-height:1.5\"\u003eGenuine Grundfos equipment, factory-new in original packaging — sold and supported by Watermain Supply, an independent industrial distributor.\u003c\/div\u003e\n\u003cdiv class=\"gs-sec\"\u003e\n\u003cdiv class=\"gs-h\"\u003eOverview\u003c\/div\u003e\n\u003cdiv class=\"gs-lead\"\u003e\n\u003cp\u003eThe Grundfos SCALA2 is a fully integrated, variable-speed pressure booster. An integrated pressure sensor and inverter continuously adjust motor speed to hold a constant set point across the whole home, delivering soft starts, high efficiency and steady flow even as inlet pressure varies.\u003c\/p\u003e\n\u003cp\u003eThe all-in-one design bundles pump, permanent-magnet motor, diaphragm tank, sensor, controller and check valves in one aluminum-and-composite housing. Self-priming to 26 ft of lift, water-cooled, and suited to demanding municipal feeds with an adjustable set point and higher chloride tolerance. Ports are 1 in NPT on both suction and discharge.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"gs-sec\"\u003e\n\u003cdiv class=\"gs-h\"\u003eSpecifications\u003c\/div\u003e\n\u003cdiv class=\"table-wrapper\"\u003e\u003ctable class=\"gs-tbl\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eSCALA2 3-45\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003eVariable-speed, constant-pressure booster\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNominal Flow\u003c\/td\u003e\n\u003ctd\u003e13 GPM (3 m³\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Flow\u003c\/td\u003e\n\u003ctd\u003eUp to 18 GPM (4.2 m³\/h)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Head\u003c\/td\u003e\n\u003ctd\u003e147 ft (45 m)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMotor\u003c\/td\u003e\n\u003ctd\u003e3\/4 HP, permanent magnet\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupply Voltage\u003c\/td\u003e\n\u003ctd\u003e115V or 230V, 1-phase, 50\/60 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDefault Set Point\u003c\/td\u003e\n\u003ctd\u003e43 psi (3 bar), adjustable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax System Pressure\u003c\/td\u003e\n\u003ctd\u003e145 psi (10 bar)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Inlet Pressure\u003c\/td\u003e\n\u003ctd\u003e87 psi (6 bar)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Suction Lift\u003c\/td\u003e\n\u003ctd\u003e26 ft (8 m)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePorts\u003c\/td\u003e\n\u003ctd\u003e1 in NPT suction and discharge\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eExpansion Tank\u003c\/td\u003e\n\u003ctd\u003eIntegrated diaphragm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNoise Level\u003c\/td\u003e\n\u003ctd\u003e44 dB(A) typical\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Ambient \/ Liquid Temp\u003c\/td\u003e\n\u003ctd\u003e113°F (60 Hz variants) \/ 113°F\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTwin Installation\u003c\/td\u003e\n\u003ctd\u003eParallel twin accessory set available; pumps not electronically paired\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEnclosure\u003c\/td\u003e\n\u003ctd\u003eAluminum + composite\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIP Rating\u003c\/td\u003e\n\u003ctd\u003eIPX4D (outdoor)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003epH \/ Max Chloride\u003c\/td\u003e\n\u003ctd\u003e4–9 \/ 300 ppm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertifications\u003c\/td\u003e\n\u003ctd\u003eNSF\/ANSI 61 + 372, cULus, WRAS, ACS, CE\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"gs-sec\"\u003e\n\u003cdiv class=\"gs-h\"\u003eApplications\u003c\/div\u003e\n\u003cul class=\"gs-apps\"\u003e\n\u003cli\u003eCity mains boosting with varying pressure\u003c\/li\u003e\n\u003cli\u003eRoof and storage tank boosting\u003c\/li\u003e\n\u003cli\u003eConstant pressure to kitchen and bath fixtures\u003c\/li\u003e\n\u003cli\u003eWhole-home multi-fixture supply\u003c\/li\u003e\n\u003cli\u003eShallow wells to 26 ft lift\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"gs-sec\"\u003e\n\u003cdiv class=\"gs-h\"\u003eProtection\u003c\/div\u003e\n\u003cdiv class=\"gs-lead\"\u003e\u003cp\u003eDry-running protection (always on), micro-leakage alarm, 30-minute maximum-runtime timer and built-in thermal motor protection with automatic restart — no external motor protection required.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"gs-note\"\u003e\n\u003cb\u003eSelection \u0026amp; Sizing\u003c\/b\u003eSCALA2 installs as a single pump or as a parallel twin on the SCALA2 twin accessory set; unlike SCALA1, the two pumps are not electronically paired (no comms cable, alternation or staging). Match voltage to your service — 115V uses a NEMA 5-15 plug, 230V a NEMA 6-15. Set the tank precharge to the pressure set point at startup.\u003c\/div\u003e\n\u003cdiv class=\"gs-contact\"\u003eFor engineering-led sizing and selection support or a factory submittal, email \u003ca href=\"mailto:sales@watermainsupply.com\"\u003esales@watermainsupply.com\u003c\/a\u003e or call \u003ca href=\"tel:18885104036\"\u003e1-888.510.4036\u003c\/a\u003e.\u003cbr\u003e© Watermain Supply — A division of E4 Industrial LLC\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch5\u003eData Sheet\u003c\/h5\u003e\n\u003cdiv class=\"gs\"\u003e\n\u003cdiv class=\"gs-dl\"\u003e\n\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0264\/1913\/4527\/files\/98880508_03_2024_SCALA2_IO_GB_online.pdf?v=1788621103\" target=\"_blank\" rel=\"noopener\"\u003eSCALA2 Installation \u0026amp; Operating\u003c\/a\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0264\/1913\/4527\/files\/98880509_1223_SCALA2_DS_online.pdf?v=1788621102\" target=\"_blank\" rel=\"noopener\"\u003eSCALA2 Data Sheet\u003c\/a\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0264\/1913\/4527\/files\/93058721_11.2023_SCALA2_QG.pdf?v=1788621103\" target=\"_blank\" rel=\"noopener\"\u003eSCALA2 Quick Guide\u003c\/a\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0264\/1913\/4527\/files\/DN001233_0324_Grundfos_SCALA2_Leaflet.pdf?v=1788621102\" target=\"_blank\" rel=\"noopener\"\u003eSCALA2 Leaflet\u003c\/a\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0264\/1913\/4527\/files\/99735562_07.2026__SCALA_Databooklet_online.pdf?v=1788621088\" target=\"_blank\" rel=\"noopener\"\u003eSCALA Data Booklet\u003c\/a\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0264\/1913\/4527\/files\/93062453_07.2025_SCALA2_lockinpin_mini_QG.pdf?v=1788621102\" target=\"_blank\" rel=\"noopener\"\u003eSCALA2 Locking Pin Guide\u003c\/a\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0264\/1913\/4527\/files\/99735560_05.2025_SCALA_Filter_QG.pdf?v=1788621087\" target=\"_blank\" rel=\"noopener\"\u003eInlet Filter Quick Guide\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003ch5\u003eVideos\u003c\/h5\u003e\n\u003cdiv class=\"gs\"\u003e\n\u003cdiv class=\"gs-sec\" style=\"margin-top:6px\"\u003e\n\u003cdiv class=\"gs-h\"\u003eInstallation\u003c\/div\u003e\n\u003cdiv style=\"display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:20px;margin-top:4px\"\u003e\u003cdiv\u003e\n\u003cdiv style=\"position:relative;padding-top:56.25%;background:#E1E3E6\"\u003e\u003ciframe src=\"https:\/\/www.youtube.com\/embed\/t_eo6GBKLRA?rel=0\" title=\"How to Install the Grundfos SCALA2 Pump\" loading=\"lazy\" style=\"position:absolute;top:0;left:0;width:100%;height:100%;border:0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003cdiv style=\"font-family:Arial Black,Arial,sans-serif;font-size:13px;color:#4A4A4F;margin-top:8px;line-height:1.35\"\u003eHow to Install the Grundfos SCALA2 Pump \u003cspan style=\"color:#9B9EA3;font-family:Arial;font-weight:400\"\u003e· 3:58\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"gs-sec\" style=\"margin-top:6px\"\u003e\n\u003cdiv class=\"gs-h\"\u003eService \u0026amp; Repair\u003c\/div\u003e\n\u003cdiv style=\"display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:20px;margin-top:4px\"\u003e\n\u003cdiv\u003e\n\u003cdiv style=\"position:relative;padding-top:56.25%;background:#E1E3E6\"\u003e\u003ciframe src=\"https:\/\/www.youtube.com\/embed\/yiJcS2lC4Yo?rel=0\" title=\"How to Service SCALA2 — Quick Disassembly and Assembly\" loading=\"lazy\" style=\"position:absolute;top:0;left:0;width:100%;height:100%;border:0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003cdiv style=\"font-family:Arial Black,Arial,sans-serif;font-size:13px;color:#4A4A4F;margin-top:8px;line-height:1.35\"\u003eHow to Service SCALA2 — Quick Disassembly and Assembly \u003cspan style=\"color:#9B9EA3;font-family:Arial;font-weight:400\"\u003e· 9:04\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv style=\"position:relative;padding-top:56.25%;background:#E1E3E6\"\u003e\u003ciframe src=\"https:\/\/www.youtube.com\/embed\/Ok0m6UfLnOo?rel=0\" title=\"How to Service SCALA2 — Detailed Disassembly\" loading=\"lazy\" style=\"position:absolute;top:0;left:0;width:100%;height:100%;border:0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003cdiv style=\"font-family:Arial Black,Arial,sans-serif;font-size:13px;color:#4A4A4F;margin-top:8px;line-height:1.35\"\u003eHow to Service SCALA2 — Detailed Disassembly \u003cspan style=\"color:#9B9EA3;font-family:Arial;font-weight:400\"\u003e· 5:07\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv style=\"position:relative;padding-top:56.25%;background:#E1E3E6\"\u003e\u003ciframe src=\"https:\/\/www.youtube.com\/embed\/HdPqmrCJs8M?rel=0\" title=\"How to Service SCALA2 — Detailed Assembly\" loading=\"lazy\" style=\"position:absolute;top:0;left:0;width:100%;height:100%;border:0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003cdiv style=\"font-family:Arial Black,Arial,sans-serif;font-size:13px;color:#4A4A4F;margin-top:8px;line-height:1.35\"\u003eHow to Service SCALA2 — Detailed Assembly \u003cspan style=\"color:#9B9EA3;font-family:Arial;font-weight:400\"\u003e· 6:53\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv style=\"position:relative;padding-top:56.25%;background:#E1E3E6\"\u003e\u003ciframe src=\"https:\/\/www.youtube.com\/embed\/eTBeQvKDxx4?rel=0\" title=\"How to Disassemble a Grundfos SCALA2\" loading=\"lazy\" style=\"position:absolute;top:0;left:0;width:100%;height:100%;border:0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003cdiv style=\"font-family:Arial Black,Arial,sans-serif;font-size:13px;color:#4A4A4F;margin-top:8px;line-height:1.35\"\u003eHow to Disassemble a Grundfos SCALA2 \u003cspan style=\"color:#9B9EA3;font-family:Arial;font-weight:400\"\u003e· 4:28\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv style=\"position:relative;padding-top:56.25%;background:#E1E3E6\"\u003e\u003ciframe src=\"https:\/\/www.youtube.com\/embed\/bDgnBIvAYIc?rel=0\" title=\"How to Assemble a Grundfos SCALA2\" loading=\"lazy\" style=\"position:absolute;top:0;left:0;width:100%;height:100%;border:0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003cdiv style=\"font-family:Arial Black,Arial,sans-serif;font-size:13px;color:#4A4A4F;margin-top:8px;line-height:1.35\"\u003eHow to Assemble a Grundfos SCALA2 \u003cspan style=\"color:#9B9EA3;font-family:Arial;font-weight:400\"\u003e· 4:50\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp style=\"font-size:12px;color:#9B9EA3;margin-top:14px\"\u003eVideos are published by Grundfos on its official YouTube channel and open in an embedded player. Content © Grundfos Holding A\/S.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- \/TABS --\u003e","brand":"Grundfos","offers":[{"title":"115V - NEMA 5-15","offer_id":47450107019439,"sku":"93013251","price":1488.88,"currency_code":"USD","in_stock":true},{"title":"230V - NEMA 6-15","offer_id":47450107052207,"sku":"93013250","price":1488.88,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0264\/1913\/4527\/files\/Grundros_Scala_2_3289dbdf-8ee5-4320-b779-aa1db53c8072.webp?v=1788622116"},{"product_id":"grundfos-scala-booster-accessories","title":"Grundfos SCALA Booster Pump Accessories - Genuine Factory Parts","description":"\u003c!-- TABS --\u003e\n\u003ch5\u003eDescription\u003c\/h5\u003e\n\u003cstyle\u003e\n.gs,.gs *{box-sizing:border-box;margin:0;padding:0}\n.gs{--c1:#B3122A;--g1:#4A4A4F;--s1:#9B9EA3;--a1:#E1E3E6;--k1:#C7CBD1;--d1:#B8BDC4;--w:#FFFFFF;font-family:Arial,Helvetica,sans-serif;color:var(--g1);font-size:15px;line-height:1.6;max-width:960px;margin:0 auto}\n.gs-head{background:var(--g1);color:var(--w);padding:22px 26px;border-left:5px solid var(--c1)}\n.gs-eyebrow{font-size:11px;font-weight:700;letter-spacing:.11em;text-transform:uppercase;color:var(--c1);margin-bottom:6px}\n.gs-title{font-family:\"Arial Black\",Arial,sans-serif;font-size:22px;font-weight:900;text-transform:uppercase;letter-spacing:.01em;line-height:1.15}\n.gs-sub{color:var(--k1);font-size:13px;margin-top:8px;max-width:640px}\n.gs-badges{display:flex;flex-wrap:wrap;gap:7px;margin:16px 0 6px}\n.gs-badge{background:var(--a1);border:1px solid var(--k1);color:var(--g1);font-size:11px;font-weight:700;letter-spacing:.03em;text-transform:uppercase;padding:5px 11px;border-radius:2px}\n.gs-sec{margin-top:26px}\n.gs-h{font-family:\"Arial Black\",Arial,sans-serif;font-size:12px;font-weight:900;letter-spacing:.1em;text-transform:uppercase;color:var(--c1);border-bottom:2px solid var(--a1);padding-bottom:6px;margin-bottom:12px}\n.gs-lead p{margin-bottom:10px}\n.gs-lead p:last-child{margin-bottom:0}\n.gs table{width:100%;border-collapse:collapse;font-size:13px;background:var(--w)}\n.gs .gs-tbl th{background:var(--g1);color:var(--w);font-family:\"Arial Black\",Arial,sans-serif;font-size:10px;font-weight:900;text-transform:uppercase;letter-spacing:.06em;text-align:left;padding:9px 12px;border-bottom:2px solid var(--c1)}\n.gs .gs-tbl td{padding:8px 12px;border-bottom:1px solid var(--a1);vertical-align:top}\n.gs .gs-tbl tr:last-child td{border-bottom:none}\n.gs .gs-tbl td:first-child{font-weight:700;color:var(--g1);width:34%}\n.gs .gs-tbl tr:nth-child(even) td{background:#f7f7f8}\n.gs-apps{list-style:none;display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:6px 18px;font-size:13px}\n.gs-apps li{padding-left:16px;position:relative}\n.gs-apps li::before{content:\"\";position:absolute;left:0;top:8px;width:6px;height:6px;background:var(--c1);border-radius:1px}\n.gs-note{background:#fff8f8;border:1px solid #f0c0c6;border-left:4px solid var(--c1);padding:14px 18px;font-size:13px;line-height:1.65;border-radius:0 2px 2px 0;margin-top:22px}\n.gs-note b{color:var(--c1);text-transform:uppercase;letter-spacing:.05em;font-size:11px;display:block;margin-bottom:4px;font-family:\"Arial Black\",Arial,sans-serif}\n.gs-contact{margin-top:18px;padding-top:14px;border-top:1px solid var(--a1);font-size:12px;color:var(--s1)}\n.gs-contact a{color:var(--c1);font-weight:700;text-decoration:none}\n.gs-dl{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:10px}\n.gs-dl a{display:flex;align-items:center;gap:9px;background:var(--a1);border-top:2px solid var(--d1);padding:12px 14px;font-size:12px;font-weight:700;color:var(--g1);text-decoration:none;line-height:1.35;transition:border-color .15s,background .15s}\n.gs-dl a:hover{border-top-color:var(--c1);background:var(--w)}\n.gs-dl a::before{content:\"⇩\";color:var(--c1);font-size:15px;font-weight:900;flex-shrink:0}\n\u003c\/style\u003e\n\u003cdiv class=\"gs\"\u003e\n\u003cdiv class=\"gs-head\"\u003e\n\u003cdiv class=\"gs-eyebrow\"\u003eGrundfos · Genuine Factory Accessories\u003c\/div\u003e\n\u003cdiv class=\"gs-title\"\u003eSCALA Booster Accessories\u003c\/div\u003e\n\u003cdiv class=\"gs-sub\"\u003eFactory accessories for the Grundfos SCALA1 and SCALA2 booster line — order with the pump so the job ships together. More accessories will be added to this listing as they are stocked.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#E1E3E6;border-left:3px solid #B8BDC4;padding:8px 14px;font-size:11.5px;color:#4A4A4F;margin-top:14px;line-height:1.5\"\u003eGenuine Grundfos equipment, factory-new in original packaging — sold and supported by Watermain Supply, an independent industrial distributor.\u003c\/div\u003e\n\u003cdiv class=\"gs-sec\"\u003e\n\u003cdiv class=\"gs-h\"\u003eInlet Filter — 250 Micron (99725185)\u003c\/div\u003e\n\u003cdiv class=\"gs-lead\"\u003e\n\u003cp\u003eA cleanable 250-micron inlet filter that protects the pump from sand, gravel and debris on well, tank and rainwater feeds — the single most effective insurance on any suction-fed SCALA installation. The square-mesh cartridge spreads flow across its whole surface to resist clogging, rinses clean, and reuses repeatedly. \u003cstrong\u003eFits both SCALA1 and SCALA2\u003c\/strong\u003e, per Grundfos, and any pump with a 1 in NPT inlet.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"table-wrapper\"\u003e\u003ctable class=\"gs-tbl\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eInlet Filter\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatibility\u003c\/td\u003e\n\u003ctd\u003eSCALA1 (3-45, 5-55) and SCALA2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFiltration\u003c\/td\u003e\n\u003ctd\u003e250 micron, 80 percent efficiency, cleanable cartridge\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConnections\u003c\/td\u003e\n\u003ctd\u003e1 in NPT female inlet × 1 in NPT male outlet\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Operating Pressure\u003c\/td\u003e\n\u003ctd\u003e116 psi\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e2-year manufacturer warranty\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"gs-sec\"\u003e\n\u003cdiv class=\"gs-h\"\u003eTwin Installation Set (99725168)\u003c\/div\u003e\n\u003cdiv class=\"gs-lead\"\u003e\n\u003cp\u003eEverything needed to mount two SCALA pumps as one twin booster: composite base plate, inlet and outlet manifolds with four brass isolation valves, NBR o-rings, stainless fixing screws and the pump-to-pump communication cable. Per Grundfos, the set connects \u003cstrong\u003etwo SCALA1 or two SCALA2 pumps\u003c\/strong\u003e in a twin booster system.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow the two models behave on it differs.\u003c\/strong\u003e The communication cable works on SCALA1 only: a SCALA1 pair runs as a coordinated electronic twin — duty\/assist for higher flow or duty\/standby for redundancy, with automatic alternation by running hours, configured over Bluetooth in the Grundfos GO app. A SCALA2 pair mounts on the same hardware as a parallel twin, but the pumps run independently, each holding its own constant-pressure set point.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"table-wrapper\"\u003e\u003ctable class=\"gs-tbl\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eTwin Installation Set\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatibility\u003c\/td\u003e\n\u003ctd\u003eSCALA1 3-45 \u0026amp; 5-55 (electronic twin) and SCALA2 (parallel twin); pumps sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eContents\u003c\/td\u003e\n\u003ctd\u003e1 base plate, 2 manifolds with 4 isolation valves, 2 o-rings, 4 screws, communication cable (functions on SCALA1 only)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTwin Modes (SCALA1)\u003c\/td\u003e\n\u003ctd\u003eDuty\/assist or duty\/standby with automatic alternation, set up in Grundfos GO\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConnections\u003c\/td\u003e\n\u003ctd\u003e1 in NPT female suction, 1-1\/4 in outlet port; 2.62 ft communication cable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterials\u003c\/td\u003e\n\u003ctd\u003eComposite base plate and manifolds, brass isolation valves, stainless steel screws, NBR o-rings\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Operating Pressure\u003c\/td\u003e\n\u003ctd\u003e116 psi\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDrinking Water Approvals\u003c\/td\u003e\n\u003ctd\u003eWRAS, ACS, cULus drinking water system component\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNet Weight \/ Origin\u003c\/td\u003e\n\u003ctd\u003e10.1 lb \/ Made in Hungary\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e2-year manufacturer warranty\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"gs-note\"\u003e\n\u003cb\u003eSelection Note\u003c\/b\u003eAdd the inlet filter on any well, cistern, storage-tank or rainwater feed regardless of model. Choose the twin set with SCALA1 when you want coordinated standby or staged flow, or with SCALA2 when two independent constant-pressure units on one manifold suit the installation — see the twin setup video on the SCALA1 product page before ordering.\u003c\/div\u003e\n\u003cdiv class=\"gs-contact\"\u003eFor engineering-led sizing and selection support, email \u003ca href=\"mailto:sales@watermainsupply.com\"\u003esales@watermainsupply.com\u003c\/a\u003e or call \u003ca href=\"tel:18885104036\"\u003e1-888.510.4036\u003c\/a\u003e.\u003cbr\u003e© Watermain Supply — A division of E4 Industrial LLC\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch5\u003eData Sheet\u003c\/h5\u003e\n\u003cdiv class=\"gs\"\u003e\n\u003cdiv class=\"gs-dl\"\u003e\n\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0264\/1913\/4527\/files\/99735562_07.2026__SCALA_Databooklet_online.pdf?v=1788621088\" target=\"_blank\" rel=\"noopener\"\u003eSCALA Data Booklet\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cp style=\"font-size:12px;color:#9B9EA3;margin-top:10px\"\u003eAccessory details appear in the SCALA data booklet accessories section.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- \/TABS --\u003e","brand":"Grundfos","offers":[{"title":"Twin Installation Set - 1 in NPT","offer_id":47451137114287,"sku":"99725168","price":914.64,"currency_code":"USD","in_stock":true},{"title":"Inlet Filter - 250 Micron - 1 in NPT","offer_id":47451137081519,"sku":"99725185","price":107.55,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0264\/1913\/4527\/files\/Scala_1-2_Twin_Accessory_Set_08bbccc1-8585-4b57-9344-1646c682b1ab.webp?v=1788663282"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0264\/1913\/4527\/collections\/Grundfos_scala_1_twin_setup.webp?v=1788624336","url":"https:\/\/watermainsupply.com\/collections\/grundfos-scala-pressure-boosting-system.oembed","provider":"Watermainsupply","version":"1.0","type":"link"}