{"product_id":"grundfos-hydro-multi-diaphragm-tank","title":"Grundfos Diaphragm Tank for Hydro Multi-E and Multi-B Booster Systems - Non-Code","description":"\u003c!-- TABS --\u003e\n\u003ch5\u003eDescription\u003c\/h5\u003e\n\u003cdiv class=\"gs\"\u003e\n\u003cdiv class=\"gs-head\"\u003e\n\u003cdiv class=\"gs-eyebrow\"\u003eGrundfos · Booster Accessory\u003c\/div\u003e\n\u003cdiv class=\"gs-title\"\u003eDiaphragm Tank for Hydro Multi Booster Systems\u003c\/div\u003e\n\u003cdiv class=\"gs-sub\"\u003eThe Grundfos-listed non-code diaphragm tank for each Hydro Multi-E and Hydro Multi-B pump size, 4.4 to 44 gallons.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"gs-badges\"\u003e\n\u003cdiv class=\"gs-badge\"\u003e4.4 to 44 Gal\u003c\/div\u003e\n\u003cdiv class=\"gs-badge\"\u003eNon-Code\u003c\/div\u003e\n\u003cdiv class=\"gs-badge\"\u003ePrecharge 0.7 x Setpoint\u003c\/div\u003e\n\u003cdiv class=\"gs-badge\"\u003eHydro Multi-E\u003c\/div\u003e\n\u003cdiv class=\"gs-badge\"\u003eHydro Multi-B\u003c\/div\u003e\n\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\u003eGrundfos ships Hydro Multi-E and Hydro Multi-B booster systems without a tank and lists one diaphragm tank per pump size. The tank holds a small volume of water under pressure so the system can ride through low demand without restarting a pump for every draw; Grundfos recommends fitting one sized to the application to accommodate operation at low flow.\u003c\/p\u003e\n\u003cp\u003eGrundfos states each size as the \u003cstrong\u003erecommended minimum\u003c\/strong\u003e for the pump it is listed against. A larger tank is not wrong; a smaller one is.\u003c\/p\u003e\n\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 supplier.\u003c\/div\u003e\n\u003cdiv style=\"background:#fff;border-left:5px solid #B3122A;padding:15px 18px;margin-top:12px\"\u003e\n\u003cdiv style=\"font-family:Arial Black,Arial,sans-serif;font-size:15px;color:#B3122A;text-transform:uppercase;letter-spacing:1px;margin-bottom:6px\"\u003e12-Month Warranty\u003c\/div\u003e\n\u003cp style=\"margin:0;font-size:13.5px;color:#4A4A4F;line-height:1.55\"\u003eCovered for \u003cstrong\u003e12 months from the date of purchase\u003c\/strong\u003e.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"gs-sec\"\u003e\n\u003cdiv class=\"gs-h\"\u003eModels and Ratings\u003c\/div\u003e\n\u003cdiv class=\"gs-lead\"\u003e\n\u003cdiv class=\"table-wrapper\"\u003e\u003ctable class=\"gs-tbl\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003ePart No.\u003c\/th\u003e\n\u003cth\u003eVolume\u003c\/th\u003e\n\u003cth\u003eListed for\u003c\/th\u003e\n\u003cth\u003eRating\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e91121888\u003c\/td\u003e\n\u003ctd\u003e4.4 gal\u003c\/td\u003e\n\u003ctd\u003eHydro Multi-E CRE 3 and CRE 5; Hydro Multi-B CME 3 and CME 5\u003c\/td\u003e\n\u003ctd\u003eNon-code\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e91121890\u003c\/td\u003e\n\u003ctd\u003e10.3 gal\u003c\/td\u003e\n\u003ctd\u003eHydro Multi-E CRE 10; Hydro Multi-B CME 10 and CME 15\u003c\/td\u003e\n\u003ctd\u003eNon-code\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e91121893\u003c\/td\u003e\n\u003ctd\u003e34 gal\u003c\/td\u003e\n\u003ctd\u003eHydro Multi-E CRE 15; Hydro Multi-B CME 15 and CME 25\u003c\/td\u003e\n\u003ctd\u003eNon-code\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e91121894\u003c\/td\u003e\n\u003ctd\u003e44 gal\u003c\/td\u003e\n\u003ctd\u003eHydro Multi-E CRE 20\u003c\/td\u003e\n\u003ctd\u003eNon-code\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\n\u003cp style=\"font-size:12.5px;color:#9B9EA3;line-height:1.55\"\u003eSizes and pairings from the Grundfos price list effective January 1, 2026 (Hydro Multi-E and Hydro Multi-B pages); Grundfos lists both the 10.3 and 34 gal tanks for CME 15. Tank size is the recommended minimum.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"gs-sec\"\u003e\n\u003cdiv class=\"gs-h\"\u003eSetting Up the Tank\u003c\/div\u003e\n\u003cdiv class=\"gs-lead\"\u003e\n\u003cdiv class=\"table-wrapper\"\u003e\u003ctable class=\"gs-tbl\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrecharge\u003c\/td\u003e\n\u003ctd\u003e0.7 times the system setpoint\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMeasuring precharge\u003c\/td\u003e\n\u003ctd\u003eMeasure in a pressureless system\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefilling\u003c\/td\u003e\n\u003ctd\u003eGrundfos recommends refilling with nitrogen\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003c\/div\u003e\n\u003cp style=\"font-size:12.5px;color:#9B9EA3;line-height:1.55\"\u003eSource: Hydro Multi-E Data Booklet 99347082, printed page 13.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"gs-note\"\u003e\n\u003cb\u003eBefore You Order\u003c\/b\u003eMatch the tank to the pump size in your system from the table above. Grundfos does not publish the tank connection size or maximum pressure in its price list, so ask us to confirm both against your system pressure before ordering.\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\u003cdiv class=\"gs-dl\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0264\/1913\/4527\/files\/99347082_10.2025_Hydro_Multi-E_DB_US_Online.pdf?v=1790437860\" target=\"_blank\" rel=\"noopener\"\u003eHydro Multi-E Data Booklet, US 60 Hz (99347082, 10.2025)\u003c\/a\u003e\u003c\/div\u003e\u003c\/div\u003e\n\u003ch5\u003eVideos\u003c\/h5\u003e\n\u003cdiv class=\"gs\"\u003e\u003cp style=\"font-size:13px;color:#9B9EA3\"\u003eNo manufacturer video is currently published for this item. Call 1-888.510.4036 and we will walk you through it.\u003c\/p\u003e\u003c\/div\u003e\n\u003c!-- \/TABS --\u003e","brand":"Grundfos","offers":[{"title":"4.4 Gal - CRE 3, CRE 5, CME 3, CME 5","offer_id":50537050505391,"sku":"91121888","price":214.25,"currency_code":"USD","in_stock":true},{"title":"10.3 Gal - CRE 10, CME 10, CME 15","offer_id":50537050538159,"sku":"91121890","price":476.6,"currency_code":"USD","in_stock":true},{"title":"34 Gal - CRE 15, CME 15, CME 25","offer_id":50537050570927,"sku":"91121893","price":1123.08,"currency_code":"USD","in_stock":true},{"title":"44 Gal - CRE 20","offer_id":50537050603695,"sku":"91121894","price":1525.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0264\/1913\/4527\/files\/Grundfos_Pressure_Tanks_Square_White_2372d550-457c-4ee0-9346-130a66d83a69.png?v=1790445326","url":"https:\/\/watermainsupply.com\/products\/grundfos-hydro-multi-diaphragm-tank","provider":"Watermainsupply","version":"1.0","type":"link"}