DAB Esybox Max pressure booster

DAB Esybox Booster System

DAB Esybox variable speed booster pumps deliver constant water pressure from a single integrated unit: multistage pump, VFD, pressure and flow sensors, check valve, and expansion tank in one sound-absorbing enclosure. Choose the plug-in Esybox Mini 3 for a single-family home (21 GPM, 180 ft), the Esybox for larger and multi-story homes (32 GPM, 213 ft), or the modular Esybox Max for commercial buildings to 14 floors, configurable as single, twin, triple, or quad stations up to 316 ft of head. All models are NSF 61 and 372 certified for drinking water, UL and CSA listed, and stocked in Houston. Not sure which model fits? See our DAB Esybox selection and comparison guide or call 281.664.8000 for engineering-led sizing.

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DAB Esybox Diver Submersible Pressure Pump - 1.3 HP, 31.7 GPM, 180 ft Head, 1-1/4 in NPT
DAB Esybox Diver submersible pressure pump

DAB

DAB Esybox Diver Submersible Pressure Pump - 1.3 HP, 31.7 GPM, 180 ft Head, 1-1/4 in NPT

$2,903.60
DAB Esybox Max Commercial Pressure Booster - 2.68 to 4.7 HP, up to 76 GPM, 316 ft Head
DAB Esybox Max pressure booster

DAB

DAB Esybox Max Commercial Pressure Booster - 2.68 to 4.7 HP, up to 76 GPM, 316 ft Head

From $4,952.63
DAB Esybox Automatic Pressure Booster - 2.1 HP, 31.7 GPM, 213 ft Head
DAB Esybox pressure booster

DAB

DAB Esybox Automatic Pressure Booster - 2.1 HP, 31.7 GPM, 213 ft Head

$2,964.29
DAB Esybox Mini 3 Automatic Pressure Booster - 1.1 HP, 21.1 GPM, 180 ft Head, 1" NPT
DAB Esybox Mini 3 pressure booster

DAB

DAB Esybox Mini 3 Automatic Pressure Booster - 1.1 HP, 21.1 GPM, 180 ft Head, 1" NPT

$1,498.29

DAB Esybox Booster System

DAB Pumps

DAB Esybox Variable Speed
Water Pressure Booster Systems

Esybox Mini 3, Esybox, and Esybox Max: all-in-one constant pressure booster pumps with integrated VFD, pressure and flow sensors, expansion tank, and check valve. Residential to 14-story commercial. Houston stock, engineering-led sizing.

3Esybox platforms
1.1–4.7 HPMotor range
21–76 GPMPer pump unit
180–316 ftMax head
NSF 61 / 372UL & CSA listed

DAB Pumps is an Italian pump manufacturer with a U.S. operation in Ladson, South Carolina. The Esybox line is DAB's integrated electronic pressurization platform: a multistage pump, permanent magnet or water-cooled motor, variable frequency drive, pressure and flow sensors, non-return valve, and expansion tank packaged in a single sound-absorbing enclosure. There is no separate pressure switch, no external tank, and no control panel to wire. Set the pressure on the display, connect suction and discharge, and the system holds constant pressure regardless of demand.

Watermain Supply stocks the U.S. 60 Hz Esybox range with NPT connections and U.S. plugs, supported by an engineering-led sales team that sizes to your fixture count, elevation, and inlet pressure. This page compares the three Esybox platforms and six pump models so you can select the right unit, or call 281.664.8000 and we will size it for you.

The Esybox Line

Three platforms built on the same integrated-VFD concept, scaled from a single-family home to a multi-pump commercial booster station.

Esybox Mini 3

Compact residential booster

21.1 GPMmax flow
180 ftmax head
1.1 HP0.85 kW
115 V1-phase, plug-in

The smallest Esybox. A three-impeller VFD booster designed to pressurize a single residence, with a set-point range of 15 to 80 psi, self-priming suction to 26 ft, and a 1 in NPT inlet and outlet. Ships with a NEMA 5-15P plug for 115 V; swap to a NEMA 6-15P plug and the same unit runs on 208-240 V. Installs horizontally or vertically in tight spaces with limited air circulation.

Key specifications
  • DAB code 60212610, dual voltage 1x115-127 V / 1x208-240 V
  • 9.6 A at 115 V, 4.8 A at 230 V
  • Integrated 100 cc expansion tank and check valve
  • Max operating pressure 109 psi, liquid 32-104°F
  • Insulation class F, ambient to 122°F
  • NSF 61, NSF 372, UL, CSA
Best forSingle-family homes on city water with low street pressure, well systems with a storage tank, cabins, small irrigation zones, RV and outbuilding supply.
View Esybox Mini 3

Esybox

Full-size residential booster

31.7 GPMmax flow
213 ftmax head
2.1 HP1.55 kW
230 V1-phase, plug-in

The original award-winning Esybox. A water-cooled multistage self-priming pump with inverter control, a 0.5 gallon integrated expansion tank, and a high-resolution LCD. It runs at roughly 43 dB, mounts horizontally or vertically, and its wireless module lets up to four units operate as a group without external control wiring. Delivery ports are covered with gasketed caps so you can select the suction and discharge orientation that fits the installation.

Key specifications
  • DAB code 60212311, 1x220-240 V, 9.2 A
  • Head of 213 ft at shutoff, 174 ft at 13.2 GPM
  • Max working pressure 116 psi, IP X4
  • Self-priming to 26 ft, anti-freeze protection
  • Wireless multi-pump grouping to 4 units
  • NSF 61, NSF 372, UL, CSA
Best forLarger homes with 3 or more bathrooms, two- and three-story houses, rainwater and cistern systems, estate irrigation, small commercial buildings, and twin-pump redundancy with Esytwin.
View Esybox

Esybox Max

Commercial modular booster station

76 GPMper pump unit
316 ftmax head
2.7–4.7 HP4 models
1 or 3 phase208-240 / 380-480 V

A vertical multistage electronic pump with a water-cooled permanent magnet motor, Wi-Fi module, and integrated non-return valve and tank. Esybox Max mounts on the Esydock Max docking station, which carries the pipe connections; one person can assemble a single, twin, triple, or quad station on site. Pumps synchronize wirelessly, alternate duty, and share load. Set point is adjustable from 15 to 174 psi. Configure locally on the display or remotely through the DConnect app.

Key specifications
  • 45/120 M: 2.68 HP, 63 GPM, 195 ft, 208-240 V single phase
  • 60/120 M: 3.6 HP, 76 GPM, 227 ft, 208-240 V single phase
  • 60/120 T: 3.5 HP, 76 GPM, 227 ft, 380-480 V three phase
  • 85/120 T: 4.7 HP, 76 GPM, 316 ft, 380-480 V three phase
  • Max inlet 73 psi, nominal pressure 174 psi, IP X5
  • 2 in NPT dock connections with 1-1/4 in option
Best forMulti-family and condominium buildings to 14 floors, hotels, offices, schools, light industrial process water, commercial irrigation, and any application needing duty/standby redundancy or BMS integration.
View Esybox Max

Esybox Model Comparison

Every DAB Esybox pump model sold in the U.S. 60 Hz market, compared on the specifications that drive selection. Hydraulic data is for a single pump unit.

Specification Esybox Mini 3 Esybox Esybox Max
45/120 M		 Esybox Max
60/120 M		 Esybox Max
60/120 T		 Esybox Max
85/120 T
DAB code 60212610 60212311 60217370 60207561 60207560 60207559
Application class Residential Residential / light commercial Commercial Commercial Commercial Commercial high-head
Max flow (single unit) 21.1 GPM 31.7 GPM 63 GPM 76 GPM 76 GPM 76 GPM
Max head 180 ft 213 ft 195 ft 227 ft 227 ft 316 ft
Motor output 1.1 HP / 0.85 kW 2.1 HP / 1.55 kW 2.68 HP / 1.97 kW 3.6 HP / 2.68 kW 3.5 HP / 2.65 kW 4.7 HP / 3.50 kW
Impeller stages 3 Multistage 3 3 3 4
Supply voltage 1x115-127 V
(1x208-240 V with NEMA 6-15P plug)		 1x220-240 V 1x208-240 V 1x208-240 V 3x380-480 V 3x380-480 V
Full load current 9.6 A at 115 V
4.8 A at 230 V		 9.2 A 9.4 A 12.5 A at 208 V
11.5 A at 240 V		 4.4 A 5.6 A
Set-point range 15-80 psi Adjustable to 116 psi max working 15-174 psi 15-174 psi 15-174 psi 15-174 psi
Max inlet pressure See manual See manual 73 psi 73 psi 73 psi 73 psi
Suction capability Self-priming to 26 ft Self-priming to 26 ft Flooded suction via dock Flooded suction via dock Flooded suction via dock Flooded suction via dock
Connections 1 in NPT in / out 1 in NPT (union kit) 2 in NPT dock, 1-1/4 in option 2 in NPT dock, 1-1/4 in option 2 in NPT dock, 1-1/4 in option 2 in NPT dock, 1-1/4 in option
Integrated tank 100 cc 0.5 gal (2 L) 2 L 2 L 2 L 2 L
Mounting Horizontal or vertical Horizontal or vertical Vertical on Esydock Max Vertical on Esydock Max Vertical on Esydock Max Vertical on Esydock Max
Multi-pump grouping Twin via Esytwin Mini Up to 4 wireless 1 to 4 via docks 1 to 4 via docks 1 to 4 via docks 1 to 4 via docks
Connectivity Esy I/O V2 module (optional) Wireless; Esy I/O V2 (optional) Wi-Fi, DConnect app, Esy I/O Wi-Fi, DConnect app, Esy I/O Wi-Fi, DConnect app, Esy I/O Wi-Fi, DConnect app, Esy I/O
Protection rating Indoor; Esycover Mini for outdoor IP X4; Esycover for outdoor IP X5 IP X5 IP X5 IP X5
Max liquid temp 104°F 104°F 104°F 104°F 104°F 104°F
Max ambient temp 122°F 122°F 113°F 113°F 113°F 113°F
Weight (pump unit) 32 lb 60 lb 63.9 lb 63.9 lb 63.9 lb 66.1 lb
Certifications NSF 61, NSF 372, UL, CSA NSF 61, NSF 372, UL, CSA NSF 61, NSF 372, UL, CSA NSF 61, NSF 372, UL, CSA NSF 61, NSF 372, UL, CSA NSF 61, NSF 372, UL, CSA

Data from DAB Pumps U.S. technical catalog. Esybox Max requires an Esydock Max docking station (sold separately) to connect piping. Verify inlet pressure limits and maximum system pressure against the installation manual for your model before specifying.

Performance Data

Head available at each flow rate for the residential Esybox models, single pump at full speed. Use these to check that your required flow at the required boost falls under the curve with margin.

Esybox Mini 3: head vs. flow

Flow (GPM) 2.6 5.3 7.9 10.6 13.2 15.8 18.5 21.1
Head (ft) 180 180 161 128 102 75 46 13
Boost (psi, approx.) 78 78 70 55 44 32 20 6

Esybox: head vs. flow

Flow (GPM) 0 2.6 5.3 7.9 10.6 13.2 15.8 18.5 21.1 23.8 26.4 29 31.7
Head (ft) 213 208 202 195 187 174 157 136 115 90 62 33 7
Boost (psi, approx.) 92 90 87 84 81 75 68 59 50 39 27 14 3

Esybox Max: rated performance by model

Model Max flow (GPM) Max head (ft) Max boost (psi, approx.) Phase Twin station flow Triple station flow
Max 45/120 M 63 195 84 Single up to 126 GPM up to 189 GPM
Max 60/120 M 76 227 98 Single up to 152 GPM up to 228 GPM
Max 60/120 T 76 227 98 Three up to 152 GPM up to 228 GPM
Max 85/120 T 76 316 137 Three up to 152 GPM up to 228 GPM

Boost in psi is head in feet multiplied by 0.433. Multi-pump station flows are theoretical maximums at low head; actual combined flow depends on the system curve. Request the manufacturer curve for the duty point before committing a model to a specification.

Sizing rule of thumb. Required boost equals the pressure you want at the highest fixture, plus 0.433 psi per foot of elevation from the pump to that fixture, plus friction loss in the piping, minus the pressure available at the pump inlet. If the result lands past 70 percent of a model's maximum head at your design flow, step up one model.

Which Esybox Do You Need?

A selection guide by application. Flow figures assume typical fixture-unit demand; call us with your fixture count and elevation for an engineering-led selection.

Application Typical demand Recommended model Notes
1-2 bath home, one story 8-14 GPM at 40-60 psi Esybox Mini 3 Plug-in 115 V install. Add Esycover Mini for outdoor mounting.
3-4 bath home, two story 14-22 GPM at 50-65 psi Esybox Higher head covers second-floor showers and long runs.
Large estate, three story, irrigation 22-32 GPM at 60-75 psi Esybox, or twin Esybox on Esytwin Twin group alternates duty and doubles peak flow.
Well with storage tank (pressure side) 10-30 GPM Esybox Mini 3 or Esybox Flooded or self-priming suction to 26 ft from the tank.
Rainwater harvesting / cistern 5-25 GPM Esybox Mini 3 or Esybox Dry-run protection and anti-cycling suit intermittent draws.
Small commercial, 2-4 floors 40-75 GPM at 60-80 psi Esybox Max 45/120 M or 60/120 M Single-phase 208-240 V. Add a second unit for redundancy.
Mid-rise multifamily, 5-9 floors 75-150 GPM at 80-110 psi Twin Esybox Max 60/120 Choose M or T by available power. Duty/standby with alternation.
High-rise to 14 floors 100-225 GPM at 110-140 psi Triple Esybox Max 85/120 T Four-impeller 316 ft head. Three-phase 380-480 V.
Commercial irrigation / process water 50-225 GPM Esybox Max, 1 to 4 units Esy I/O module for float switches, remote alarm, and BMS.

What Makes Esybox Different

The technology shared across the platform, and why it matters on an installation.

Integrated variable frequency drive

The inverter adjusts motor speed continuously to hold set-point pressure as demand changes, instead of cycling a fixed-speed pump against a pressure switch. Result: constant pressure at the tap, soft start and stop, lower energy draw at partial flow, and no water hammer.

Nothing to add at install

Pressure sensor, flow sensor, check valve, and expansion tank are inside the enclosure. Suction in, discharge out, power on. Residential units plug into a standard receptacle; no control panel, pressure switch, or external tank is required.

Water-cooled motor

Cooling by the pumped liquid eliminates the fan. That is why an Esybox runs at roughly 43 dB, can be installed in a recess or closet with limited air movement, and tolerates ambient temperatures to 122°F.

Full protection suite

Dry-run protection, anti-freeze cycling, anti-blocking (periodic exercise after idle periods), anti-cycling on small leaks, overcurrent, over-temperature, and abnormal-voltage protection are standard on every model.

Wireless multi-pump groups

Esybox and Esybox Max units find each other over a built-in wireless link. Groups of up to four alternate duty, share load, and stage in as demand rises, with no interconnecting control wiring between pumps.

Self-priming hydraulics

Esybox and Esybox Mini 3 prime from dry to 26 ft of suction lift, so they draw from an atmospheric tank, cistern, or shallow well without a separate lift pump.

Remote monitoring and BMS

Esybox Max includes Wi-Fi and pairs with the DConnect app for pressure, alarms, and consumption history from a phone. The Esy I/O expansion module adds float switch, pressure switch, and remote alarm inputs, plus Modbus connectivity to a building management system.

Drinking water certified

Every U.S. Esybox model carries NSF/ANSI 61 and NSF/ANSI 372 low-lead certification for potable water contact, plus UL and CSA electrical listings.

Accessories and Docking

Factory accessories that complete an Esybox installation. Order with the pump so the job ships together.

Accessory DAB code Fits Function
Esydock Max 60199045 Esybox Max Single-pump docking base with 2 in NPT threads. Required to connect piping to any Esybox Max.
2 Esydock Max 60199055 Esybox Max Twin-pump docking base with 2 in NPT threads for duty/standby or duty/assist stations.
3 Esydock Max 60199056 Esybox Max Triple-pump docking base with 2 in NPT threads. Two twin docks with the connection kit make a quad station.
Esy I/O 60206085 Esybox Max Expansion module for external inputs and outputs (float switch, pressure switch, remote alarm) and BMS integration.
Esydock 60150514 Esybox Docking base with four plumbing configurations, all fittings included, anti-vibration feet.
Esytwin 60162081 Esybox Twin docking base for a two-pump Esybox group in roughly half the footprint of a conventional duplex.
Esytwin Mini 60218780 Esybox Mini 3 Twin docking base for a two-pump Esybox Mini 3 group.
Esywall 60161442 Esybox, Esybox Mini 3 Wall-mount kit with brackets, hardware, and two anti-vibration feet.
Esycover / Esycover Mini 60203667 Esybox, Esybox Mini 3 Rain cover for outdoor installation. Vertical installation only.
1 in stainless union kit 60220601 Esybox, Esybox Mini 3 Three-piece 1 in NPT stainless steel unions with O-ring for serviceable connections.

Esy I/O V2 for Esybox and Esybox Mini 3 is listed by DAB with code to be announced. Genuine DAB spare parts (HMI assemblies, main boards, pressure sensors, flow meter kits, non-return valves, tanks, O-ring kits) are available by pump serial number; contact us with the model and version.

Why Source DAB Esybox from Watermain Supply

Houston Stock

Esybox Mini 3, Esybox, and Esybox Max ship from Houston for fast delivery across Texas and the Gulf Coast.

Engineering-Led Sizing

We size from fixture count, elevation, inlet pressure, and pipe friction against the manufacturer curve, and we tell you when a smaller model will do the job.

Multi-Brand Perspective

We also stock A.Y. McDonald DuraMAC, Davey, Goulds, and Franklin Electric boosters. If an Esybox is not the right fit, we will say so and quote the one that is.

Commercial Station Design

Twin, triple, and quad Esybox Max stations with dock selection, Esy I/O, and BMS integration guidance for engineers and mechanical contractors.

Account Terms Available

Net-30 terms for qualified contractor, property management, and municipal accounts. PO and credit application processing handled in-house.

Parts and Aftermarket Support

Genuine DAB spare parts and accessories, with model and version cross-reference so you get the right board, sensor, or valve the first time.

Frequently Asked Questions

Common questions from homeowners, plumbers, and engineers selecting a DAB booster pump.

What is the difference between Esybox Mini 3 and Esybox?

Both are residential constant-pressure boosters with integrated VFD, tank, and check valve. Esybox Mini 3 is a 1.1 HP, 115 V plug-in unit rated to 21.1 GPM and 180 ft of head for a single home. Esybox is a 2.1 HP, 230 V unit rated to 31.7 GPM and 213 ft, with a larger 0.5 gallon tank, quieter water-cooled operation, and wireless grouping of up to four pumps. Choose Esybox for larger homes, multi-story houses, or when you want twin-pump redundancy.

Do I need a separate pressure tank with an Esybox?

No. Every Esybox model has a built-in expansion tank sized for its VFD control logic, plus an integrated check valve and pressure and flow sensors. An external tank is not required. Some installers add a small external tank to reduce start frequency on systems with very small leaks; DAB's anti-cycling logic handles this in most cases.

Can Esybox Mini 3 run on 230 V?

Yes. The Mini 3 is dual voltage, 1x115-127 V or 1x208-240 V. It ships with a NEMA 5-15P plug for 115 V. Replace it with a NEMA 6-15P plug and the same unit operates at 208-240 V, drawing 4.8 A instead of 9.6 A.

How much boost does an Esybox provide?

Head in feet converts to pressure at 0.433 psi per foot. Esybox Mini 3 delivers up to 180 ft (about 78 psi) at low flow, Esybox up to 213 ft (about 92 psi), and Esybox Max up to 316 ft (about 137 psi) on the 85/120 T model. Boost falls as flow increases; see the performance tables above. Inlet pressure adds to pump boost up to the model's maximum working pressure.

Can Esybox draw water from a tank or cistern?

Yes. Esybox and Esybox Mini 3 are self-priming to 26 ft of suction lift, so they can pull from an atmospheric storage tank, rainwater cistern, or shallow well. Esybox Max is designed for flooded suction through the Esydock Max and is normally fed from a pressurized main or a tank at or above pump level.

What does an Esybox Max need to operate?

An Esydock Max docking station (single, twin, or triple) is required to connect piping; the pump unit alone has no pipe connections. Select the dock for the number of pumps, then add the Esy I/O module if you need float switch, pressure switch, remote alarm, or BMS integration.

Single phase or three phase Esybox Max?

Choose by the power available at the mechanical room. The 60/120 M (single phase, 208-240 V) and 60/120 T (three phase, 380-480 V) have identical hydraulics at 76 GPM and 227 ft. The 85/120 T is three phase only and is the model for high-rise applications needing 316 ft of head.

Is Esybox approved for drinking water?

Yes. All U.S. models are certified to NSF/ANSI 61 for drinking water system components and NSF/ANSI 372 for low lead content, and carry UL and CSA electrical listings.

How quiet is an Esybox?

Esybox operates at roughly 43 dB in normal use, comparable to a quiet refrigerator, because the motor is cooled by the pumped water rather than a fan and the ABS enclosure is sound absorbing. Anti-vibration feet are included.

Can I install an Esybox outdoors?

Esybox and Esybox Mini 3 are indoor-rated units. For outdoor installation DAB offers the Esycover rain cover for vertical mounting. Esybox Max carries an IP X5 motor protection rating; consult us on enclosure and freeze protection for outdoor commercial installations.

Ready to Size Your Booster?

Send us your fixture count, number of floors, inlet pressure, and required flow. We will respond with a sized Esybox selection, the accessories you need, and lead time.

281.664.8000 Email sales@watermainsupply.com Request a Quote
Technical data on this page is taken from DAB Pumps U.S. 60 Hz product literature and is subject to change by the manufacturer. Confirm against the current installation manual before specifying.
DAB, Esybox, Esybox Mini 3, Esybox Max, Esydock, Esytwin, Esywall, Esycover, Esy I/O and DConnect are trademarks of DAB Pumps S.p.A. and its subsidiaries, used here for product identification only.
Watermain Supply is a DBA of E4 Industrial LLC, an independent industrial supplier based in Houston, Texas.