Grundfos Hydro Multi-E and Hydro Multi-B Booster Systems

Grundfos Hydro Multi-E and Hydro Multi-B Booster Systems

Grundfos Hydro Multi-E and Hydro Multi-B are factory-built duplex and triplex constant-pressure booster systems with a variable-speed drive in every pump and no separate control panel. Hydro Multi-E uses vertical CRE pumps up to 462 GPM and 475 ft of head, and its CRE 10, 15 and 20 builds carry a DOE Pump Energy Index as low as 0.38. Hydro Multi-B uses horizontal CME pumps in a compact 41 in tall system up to 475 GPM. Both are NSF 61/372 certified and UL listed, with multi-master redundancy and BACnet or Modbus connectivity for data centers, hospitals and commercial buildings. We size every system to your building before it ships. Call 1-888.510.4036 for engineering-led sizing.

6 products
Sort by:
Most relevant
Sort by:
Most relevant
Grundfos Hydro Multi-E Triplex Constant Pressure Booster - CRE 3 and CRE 5
Grundfos Hydro Multi-E CRE booster system

Grundfos

Free Shipping $499 or more

Grundfos Hydro Multi-E Triplex Constant Pressure Booster - CRE 3 and CRE 5

From $25,560
Grundfos Hydro Multi-E Duplex Constant Pressure Booster - CRE 3 and CRE 5
Grundfos Hydro Multi-E CRE booster system (three-pump build shown)

Grundfos

Free Shipping $499 or more

Grundfos Hydro Multi-E Duplex Constant Pressure Booster - CRE 3 and CRE 5

From $18,924
Grundfos Hydro Multi-B Triplex Constant Pressure Booster - CME Pumps
Grundfos Hydro Multi-B CME booster, side view

Grundfos

Free Shipping $499 or more

Grundfos Hydro Multi-B Triplex Constant Pressure Booster - CME Pumps

From $26,793
Grundfos Hydro Multi-B Duplex Constant Pressure Booster - CME Pumps
Grundfos Hydro Multi-B CME booster with diaphragm tank

Grundfos

Free Shipping $499 or more

Grundfos Hydro Multi-B Duplex Constant Pressure Booster - CME Pumps

From $21,163
Grundfos Hydro Multi-E Triplex Constant Pressure Booster - DOE PEI 0.38-0.45
Grundfos Hydro Multi-E CRE booster system

Grundfos

Free Shipping $499 or more

Grundfos Hydro Multi-E Triplex Constant Pressure Booster - DOE PEI 0.38-0.45

From $30,776
Grundfos Hydro Multi-E Duplex Constant Pressure Booster - DOE PEI 0.38-0.45
Grundfos Hydro Multi-E CRE booster system (three-pump build shown)

Grundfos

Free Shipping $499 or more

Grundfos Hydro Multi-E Duplex Constant Pressure Booster - DOE PEI 0.38-0.45

From $24,965

Grundfos Hydro Multi-E and Hydro Multi-B Booster Systems

Grundfos Commercial Boosters

Grundfos Hydro Multi-E and Hydro Multi-B
Variable-Speed Booster Systems

Factory-built duplex and triplex constant-pressure systems with integrated IE5 variable-speed drives, redundant control and DOE PEI-rated CRE pumps, for data centers, hospitals, high-rise and commercial buildings. Engineering-led sizing on every order.

Grundfos Hydro Multi-E CRE and Hydro Multi-B CME booster systems
462 GPMMax flow, CRE triplex
475 ftMax head, 205 psi
PEI 0.38Best DOE PEI​VL
2 or 3Pumps, all speed-controlled
NSF 61/372UL listed package

Grundfos builds the Hydro Multi-E and Hydro Multi-B as complete pressure-boosting systems: two or three Grundfos multistage pumps, each with its own integrated variable-speed drive, piped in parallel on one base with stainless steel manifolds, valves, sensors and a breaker cabinet, then pressure- and function-tested at the factory. Hydro Multi-E uses vertical CRE pumps, and its CRE 10, CRE 15 and CRE 20 builds carry a U.S. Department of Energy Pump Energy Index. Hydro Multi-B uses horizontal CME pumps in a system about 41 in tall.

We supply U.S. 60 Hz builds at 200-240V single and three phase and 440-480V three phase, and we size every system to the building before it ships: send us the peak flow, the pressure you need at the top fixture and your inlet pressure, or call 1-888.510.4036. If another system fits your job better, we will tell you which one. Genuine Grundfos equipment, factory-new in original packaging — sold and supported by Watermain Supply, an independent industrial supplier.

Will It Work for My Building?

The four questions buyers ask first, answered from Grundfos’s own documents.

Warranty

Grundfos warrants U.S. consumer purchases for up to 30 months from the date of manufacture on the nameplate; commercial purchases fall under clause 10 of Grundfos US Terms and Conditions of Sale.

Source: Hydro Multi-E installation manual 98419766.

Reliability

No single point of control: any pump with an outlet-pressure sensor can run the system, and two outlet sensors are standard. Motors carry built-in thermal protection, pumps alternate duty, and every system is pressure- and function-tested before it ships. Cartridge shaft seals and gasket kits are sold separately.

Fit

Up to 462 GPM and 475 ft on CRE, 475 GPM and 145 psi system rating on CME. Flooded or pressurized inlet, indoor installation, 41 to 180 °F water on CRE 10 to 20 (41 to 140 °F on CRE 3, CRE 5 and CME). Voltage is fixed per part number.

Size It Now

Enter floors, fixtures and incoming pressure in our sizing calculator for the flow and boost you need, then compare against the tables below.

Sizing Calculator

Or email sales@watermainsupply.com.

The Hydro Multi Line

Three platforms, each built as a factory duplex or triplex. Pick the pump family by flow and head; pick CRE 10 to 20 when the specification calls for DOE PEI.

Grundfos Hydro Multi-E booster system with CRE vertical multistage pumps

Hydro Multi-E CRE 10 to 20

DOE PEI-rated, large commercial

462GPM max, triplex
205 psiMax boost
0.38-0.45PEI VL per pump
1.5-10 HPPer pump

Two or three CRE 10, CRE 15 or CRE 20 vertical multistage pumps with Grundfos MLE permanent-magnet motors and integrated drives. The only builds in the range with a DOE Pump Energy Index, and the ones to specify where an engineer asks for PEI documentation.

Key specifications
  • Sixteen builds from CRE 10-2 to CRE 20-4
  • 2.5 in NPT to 4 in ANSI manifolds
  • 232 psi maximum system pressure
  • Inlet pressure switch or inlet sensors
Best forData centers, hospitals, hotels, offices and high-rise water supply
Grundfos Hydro Multi-E booster with CRE 3 and CRE 5 pumps

Hydro Multi-E CRE 3 and CRE 5

High head, lower flow

135GPM max, triplex
205 psiMax boost
1-5 HPPer pump
2-2.5 inNPT manifolds

The same controls and redundancy on the small CRE 3 and CRE 5 pumps, for buildings that need a lot of pressure at modest flow. These sizes sit outside the DOE PEI scope and carry no PEI rating.

Key specifications
  • Eight builds from CRE 3-6 to CRE 5-16
  • Highest heads in the range
  • 232 psi maximum system pressure
  • CRE 3-15 and CRE 5-16 are not NSF 61/372
Best forMid-rise apartments, small hotels, schools and process boosting
Grundfos Hydro Multi-B booster system with CME horizontal multistage pumps

Hydro Multi-B CME

Compact horizontal, 41 in tall

475GPM max, triplex
105 psiMax boost listed
1.5-7.5 HPPer pump
41 inSystem height

Horizontal CME pumps with integrated variable-speed drives on a low base frame, with a suction-side pressure switch for dry-running protection. The system to look at when the mechanical room has a low ceiling or overhead piping.

Key specifications
  • Builds from CME 3-5 to CME 25-2
  • 2 in NPT to 4 in ANSI manifolds
  • 145 psi maximum system pressure
  • No PEI: CME pumps are not yet regulated
Best forLight commercial, low-ceiling plant rooms and irrigation boosting

DOE Pump Energy Index (PEI), Explained

What the number measures, what it does not, and why it shows up in engineering specifications.

What PEI is

Since January 2020, clean-water pumps sold in the United States have had to meet a federal efficiency standard set by the U.S. Department of Energy. The yardstick is the Pump Energy Index: the pump’s energy rating (PER) divided by the rating of a pump that only just meets the standard for its type (PERSTD). A PEI of 1.00 is the legal ceiling; Grundfos notes that any pump, pump and motor, or pump, motor and controller above 1.00 can no longer be manufactured. Lower is better.

The rule covers the common commercial clean-water designs, including the radially split, multistage, vertical in-line pump that Grundfos builds as the CR and CRE. The energy rating comes from a DOE test at defined points around the pump’s best efficiency point, so every manufacturer is measured the same way and the numbers can be compared across brands.

Constant load vs variable load

There are two versions. PEICL (constant load) applies to a bare pump or a pump sold with a motor. PEIVL (variable load) applies to a pump sold with a motor and a speed controller, and it credits the energy the drive saves when demand falls. Every CRE pump in a Hydro Multi-E is sold with its drive built into the motor, so Grundfos prints PEIVL values.

How to read 0.38

A PEIVL of 0.38 means the pump, motor and drive are rated at 38% of the energy the minimally compliant baseline would use at the DOE test points — roughly 62% less. Grundfos adds two cautions worth repeating: PEI is a generalized value that cannot be used to calculate efficiency at your specific duty point, and the packaged skid itself has no PEI; the individual pumps in it do. Certified values can be looked up in the DOE Compliance Certification Database.

Why engineers ask for it. PEI gives a spec writer one comparable number across brands. On data center, healthcare and public projects where energy documentation is part of the submittal, the CRE 10, 15 and 20 builds let you answer the question with a manufacturer-printed value instead of an argument.
Pump Motor 1 x 200-240V 3 x 200-240V 3 x 440-480V
CRE 10 1.5 to 2 HP 0.41 0.38 0.39
CRE 10 3 to 7.5 HP — 0.38 0.39
CRE 15 2 HP 0.45 0.41 0.40
CRE 15 5 to 10 HP — 0.41 0.40
CRE 20 3 to 10 HP — 0.41 0.41
CRE 3, CRE 5 All Outside DOE PEI scope
CME (Hydro Multi-B) All In the DOE test standard, not yet regulated

PEIVL per individual pump. Source: Grundfos Hydro Multi-E Data Booklet 99347082 (10.2025), printed pages 3 and 4.

Why Hydro Multi-E Fits Data Centers

Water in a data center is a support system for cooling and for people. It has to stay on, it has to report to the BMS, and its load swings with the weather and the IT load.

Where it goes

Domestic water for restrooms, break rooms and kitchens; makeup water to evaporative cooling towers and adiabatic coolers; humidification, water treatment and RO feed. Grundfos lists humidifying, water treatment and process boosting among Hydro Multi-E applications.

N+1 redundancy

Size a triplex so two pumps carry the peak and the third is a running spare. Any sensor-equipped pump can take over as master, two outlet sensors are standard, and the pumps alternate so run hours stay even.

BMS and remote alarms

A CIM 500 puts the system on BACnet IP, Modbus TCP, PROFINET or EtherNet/IP. CIM 280 and CIM 550 connect to Grundfos Remote Management and iSolutions Cloud. Limit-exceeded functions can watch inlet pressure and water temperature.

Energy at part load

Pump power falls roughly with the cube of speed, so a pump at 80% speed draws about half the power it does at full speed. Hydro Multi-E runs only the pumps the load needs, slows them to hold pressure, and can lower the setpoint at low flow with proportional pressure.

Documented efficiency

IE5-class permanent-magnet motors with the drive built in, and a printed DOE PEIVL for every CRE 10 to 20 pump. Grundfos puts the saving from its motors at 7 to 9% against NEMA Premium on a typical domestic water load profile.

Commissioning

Pre-piped, pre-wired, pressure-tested and function-tested at the factory, UL listed as a package pumping system and NSF 61/372 certified as a system. Pipe filling ramps pressure up slowly on start-up to protect new piping from water hammer.

Where it stops. Hydro Multi-E tops out at 462 GPM and is rated for indoor mechanical rooms only. A hyperscale campus or a large cooling-tower makeup system above that belongs on an engineered package such as the Franklin Electric VR SpecPAK, which runs to 1,850 GPM as a triplex.

Energy figures: Grundfos Hydro Multi-E leaflet LHMESL02 (07.2024) and brochure (11.2025); the cube relation is the pump affinity law and is a general guide, not a duty-point calculation.

Hydro Multi-E vs Hydro Multi-B

Flow and head pick the pump family; the specification and the room pick the platform.

Specification Hydro Multi-E CRE 10-20 Hydro Multi-E CRE 3 and 5 Hydro Multi-B CME
Pumps 2 or 3 vertical CRE 10, 15, 20 2 or 3 vertical CRE 3, CRE 5 2 or 3 horizontal CME 3 to 25
Max flow, duplex / triplex 308 / 462 GPM 89 / 135 GPM 318 / 475 GPM
Max boost 205 psi (475 ft) 205 psi (475 ft) 105 psi (243 ft) on listed builds
Max system pressure 232 psi 232 psi 145 psi
DOE PEIVL 0.38 to 0.45 Out of scope Not regulated
Motor per pump 1.5 to 10 HP 1 to 5 HP 1.5 to 7.5 HP
Voltages 200-240V 1Ph or 3Ph, 440-480V 3Ph 200-240V 1Ph or 3Ph, 440-480V 3Ph 208-230V 1Ph or 3Ph, 460V 3Ph
Dry-run protection Inlet switch or inlet sensors Inlet switch or inlet sensors Suction pressure switch, 3 to 5 psi
Manifolds 2.5 in NPT to 4 in ANSI 2 to 2.5 in NPT 2 in NPT to 4 in ANSI
Liquid temperature 41 to 180 °F 41 to 140 °F 41 to 140 °F
System height 30.7 to 44 in 30.7 to 42.9 in 41 in
Listings Duplex · Triplex Duplex · Triplex Duplex · Triplex

Maximum boost and flow read from the Grundfos curve charts (Data Booklet 99347082, pages 33 to 42) and the Grundfos brochure range maximums; heights from the booklet dimension tables.

Quick rule. Specification calls for DOE PEI, or you need more than 105 psi at high flow: Hydro Multi-E CRE 10 to 20. High pressure at under 135 GPM: CRE 3 and CRE 5. Moderate pressure, a low ceiling or a 145 psi system: Hydro Multi-B.

How Hydro Multi Compares to Other Brands

We sell A.Y. McDonald DuraMAC, DAB and Franklin Electric boosters too, so we can be straight about which one fits. Competitor figures are taken from our own product listings.

Large commercial: Hydro Multi-E vs DuraMAC IQ1000 vs Franklin VR SpecPAK

Specification Grundfos Hydro Multi-E CRE 10-20 A.Y. McDonald DuraMAC IQ1000 Franklin Electric VR SpecPAK
Flow range Up to 308 / 462 GPM 160-280 / 240-420 GPM 420-1,230 / 630-1,850 GPM
Boost To 205 psi (475 ft) 56 to 150 psi To 250 psi
Motor per pump 1.5 to 10 HP 3 to 10 HP 15 to 50 HP
Voltages 200-240V 1Ph/3Ph, 440-480V 208-230V and 460V 460V 3Ph
Control Drive in every motor, multi-master, no panel Yaskawa IQ1000 drives, lead-lag PLC with 7 in touchscreen, drive per pump
BMS BACnet IP, Modbus TCP, PROFINET via CIM Ask us Modbus
Manifolds 2.5 in NPT to 4 in ANSI 3 in flanged stainless Welded frame, flanged
DOE PEI printed Yes, 0.38 to 0.45 per pump Ask us Ask us; ASHRAE 90.1-2010 noted
Approvals NSF 61/372 system, UL listed package NSF/ANSI/CAN 61 and 372 NSF/ANSI/CAN 61 and 372
Warranty Grundfos terms, see above 12 months from installation 12 months from install or 24 from manufacture; 36 with commissioning
Listing Duplex · Triplex IQ1000 Duplex · IQ1000 Triplex VR SpecPAK Duplex · Triplex

Verdict. Hydro Multi-E wins on printed DOE PEI, higher head (to 475 ft) and control redundancy without a central panel, which is why it suits data centers with an energy specification. DuraMAC IQ1000 wins where 3 in flanged stainless manifolds, lead-lag control technicians already know, and a line we stock in Houston with factory submittals per model matter more than a PEI number; it covers the same 160 to 420 GPM band at up to 150 psi. Franklin VR SpecPAK wins outright above 462 GPM or 10 HP per pump, with a touchscreen PLC and a warranty that extends to 36 months with commissioning.

Mid-size and compact: Hydro Multi-E CRE 3/5 and Multi-B vs DAB Esybox Max vs DuraMAC Micro

Specification Grundfos Hydro Multi-E CRE 3/5, Multi-B DAB Esybox Max Duplex / Triplex A.Y. McDonald DuraMAC Micro
Flow range 89 / 135 GPM (CRE 3/5); 318 / 475 GPM (CME) Up to 153 / 230 GPM 40 to 96 GPM (duplex)
Boost To 205 psi (CRE); to 105 psi (CME) Up to 136 psi (315 ft) 66 to 140 psi
Max system pressure 232 psi (CRE); 145 psi (CME) 174 psi Ask us
In the box System on base, breaker cabinet; tank sold separately Pumps, dock, I/O module and tank System on stainless base
Suction Flooded or pressurized inlet Self-priming Flooded or pressurized inlet
Control Drive in every motor, multi-master Wireless pairing, no controller Yaskawa iQpump micro
Warranty Grundfos terms 24 months from purchase 12 months from installation
Listing Hydro Multi-E CRE 3/5 · Hydro Multi-B Esybox Max Duplex · Triplex DuraMAC Micro Duplex

Verdict. DAB Esybox Max wins on a complete kit in one order (dock, I/O module and tank included), self-priming pumps and a 24-month warranty from purchase, up to 230 GPM. DuraMAC Micro is the straightforward choice from 40 to 96 GPM at up to 140 psi. Hydro Multi-E CRE 3/5 wins when you need more head than either, up to 475 ft; Hydro Multi-B wins on flow, to 475 GPM, in a 41 in tall package.

Which Booster Do You Need?

Typical starting points by application. Every job is sized to the building before we quote; demand figures here are planning estimates, not pump data.

Application Typical demand (estimate) Starting point Notes
Data center, domestic and makeup water 150 to 460 GPM, 60 to 120 psi, PEI in spec Hydro Multi-E triplex, CRE 15 or CRE 20 Size two pumps to peak, third as spare; add CIM 500 for the BMS
Hospital or lab building 100 to 300 GPM, 60 to 100 psi Hydro Multi-E duplex or triplex, CRE 10 to 15 Inlet sensors for pressure monitoring; tank for low-flow hours
High-rise residential or hotel, 15+ floors 60 to 250 GPM, 100 to 180 psi Hydro Multi-E CRE 10-6 to 10-10 Consider pressure zones above about 20 floors
Mid-rise apartments, 5 to 12 floors 40 to 130 GPM, 60 to 120 psi Hydro Multi-E CRE 5 or DuraMAC Micro Check the curve at your peak flow, not the headline max
Low-ceiling plant room, moderate pressure 60 to 450 GPM, 30 to 90 psi Hydro Multi-B CME 10 to 25 145 psi system limit; flooded inlet
Office or school, city main 50 to 200 GPM, 30 to 70 psi boost Hydro Multi-B or DAB Esybox Max Incoming pressure buys flow; size the boost, not the total
Campus or plant, above 460 GPM 500 to 1,850 GPM Franklin VR SpecPAK Beyond the Hydro Multi range

Sizing and Best Practices

How we size a Hydro Multi, and what to check before it goes in.

1. Work out the boost

Required boost = pressure wanted at the highest fixture + 0.433 psi per foot of height + friction loss − minimum inlet pressure. Grundfos’s own worked example: 29 psi wanted at a fixture 136 ft above the booster, 17.4 psi of friction and 29 psi of incoming pressure gives 29 + 58.9 + 17.4 − 29 = 76.3 psi of boost, about 176 ft of head.

2. Estimate peak flow honestly

Use water supply fixture units and the Hunter curve (IPC Table 604.3) for residential and hotel buildings, and the IAPMO Water Demand Calculator for apartments and light commercial. For cooling-tower makeup, size from evaporation, drift and blowdown at design heat load. Most booster failures come from oversizing, so size to the real peak.

3. Check the limits

Inlet pressure plus the pressure against a closed valve must stay under 232 psi (CRE) or 145 psi (CME). Standard hydraulics need a flooded or pressurized inlet; suction lift needs the factory inlet-side check valve option. Do not run below 10% of one pump’s rated flow. Allow 3 ft of clearance on all sides and fit a diaphragm tank precharged to 0.7 times the setpoint.

Rule of thumb. If your duty point sits above about 70% of a build’s maximum head at design flow, step up one build. Run the sizing calculator or read our guide to commercial variable-speed boosters.

Performance

Pressure added, read from the Grundfos curve charts. Every product page carries the full table for each build at one, two and three pumps.

Pump family Builds Max boost, psi Max flow duplex, GPM Max flow triplex, GPM
CRE 3 3-6 to 3-15 79 to 197 47 71
CRE 5 5-4 to 5-16 54 to 205 89 135
CRE 10 10-2 to 10-10 41 to 205 143 212
CRE 15 15-1 to 15-5 26 to 137 250 375
CRE 20 20-1 to 20-4 28 to 114 308 462
CME 3 3-5 94 45 68
CME 5 5-3 to 5-5 56 to 94 66 99
CME 10 10-1 to 10-3 33 to 97 158 237
CME 15 15-1 to 15-3 36 to 105 231 347
CME 25 25-1 to 25-2 37 to 73 318 475

Max boost is the peak of the curve near zero flow, a ceiling rather than a working point; max flow is the end of the duplex or triplex curve. Read from Grundfos Data Booklet 99347082 (10.2025), pages 33 to 42, at a fixed 3,480 rpm, 60 Hz; CRE 5-16 capped at the brochure maximum of 475 ft. Boost in psi equals head in feet multiplied by 0.433. Ask us for the manufacturer curve at your duty point before specifying.

Grundfos Hydro Multi-E CRE performance range chartGrundfos Hydro Multi-B CME performance range chart

What Makes Hydro Multi Different

The control lives in the pumps, not in a panel.

Drive in every motor

Grundfos MLE permanent-magnet motors carry their own frequency converter and PI controller, rated above IE5. No separate VFD panel to buy, mount, wire or cool.

Multi-master control

Any pump with an outlet sensor can run the system, so losing one pump or one sensor does not stop the water. Two outlet sensors are standard.

Automatic cascade

Pumps cut in and out with demand and alternate duty, so the system runs only the pumps it needs and wear is shared.

Stop function

At low flow the system checks demand, tops up the pressure and stops, then restarts at the start pressure. A diaphragm tank at 0.7 times the setpoint keeps this smooth.

Proportional pressure

Lowers the setpoint as flow falls to offset friction loss, saving energy and keeping taps comfortable across the day.

Pipe filling

Fills empty pipework slowly, then builds to setpoint, to avoid water hammer after a shutdown or on a new building.

Dry-running protection

Inlet pressure switch or two inlet sensors on Hydro Multi-E; suction pressure switch on Hydro Multi-B. Level switch available for tank or well sources.

Factory tested

Pressure- and function-tested before it ships, with 316 stainless manifolds shaped to cut stagnant water, noise and friction loss.

Hydro Multi Accessories

What completes an installation, each linked to its product page.

Grundfos Diaphragm Tank for Hydro Multi booster systems

Diaphragm Tank

Grundfos-listed tank per pump size, 4.4 to 44 gal

View →
Grundfos CIM 500 and CIU for Hydro Multi booster systems

CIM 500 and CIU

Ethernet module for BACnet IP, Modbus TCP and GRM

View →
Grundfos CIM 280 MK II for Hydro Multi booster systems

CIM 280 MK II

Cellular 3G/4G module and antennas for remote management

View →
Grundfos MI 301 for Grundfos GO for Hydro Multi booster systems

MI 301 for Grundfos GO

Phone interface for setup, data and reports

View →

CR Shaft Seal Kits

Cartridge seals for CRE 3 to 20 pumps

View →

Genuine Grundfos spare parts are available by model and serial number; contact us for the correct part.

Why Source Hydro Multi from Watermain Supply

Engineering-Led Sizing

Every system is sized to the building from peak flow, height and inlet pressure, and checked against the Grundfos curve before we quote.

Multi-Brand Honesty

If Hydro Multi is not the right fit, we will say so and quote the one that is: DuraMAC, which we stock, DAB or Franklin Electric.

The Right U.S. Build

60 Hz systems at the voltage and phase on your drawings, with the dry-run option, tank and BMS module matched to the job.

One Order for the System

Booster, diaphragm tank, communication module and spare seal kits quoted together.

Account Terms

Net-30 for qualified contractor, engineering, property-management and facility accounts.

Houston, Gulf Coast Service

Based in Houston and serving the Gulf Coast, with parts and aftermarket support after start-up.

Frequently Asked Questions

Warranty, fit, efficiency and sizing first.

What is a Grundfos Hydro Multi-E?

A factory-built booster system with two or three Grundfos CRE vertical multistage pumps piped in parallel on one base. Each pump has an integrated variable-speed drive, and the pumps control the system between them with no separate panel.

What is the difference between Hydro Multi-E and Hydro Multi-B?

Hydro Multi-E uses vertical CRE pumps, reaches 475 ft of head and is rated to 232 psi; its CRE 10 to 20 builds carry a DOE PEI. Hydro Multi-B uses horizontal CME pumps in a 41 in tall package rated to 145 psi.

What does DOE PEI mean on a booster?

PEI is the U.S. Department of Energy Pump Energy Index: the pump energy rating divided by that of a minimally compliant pump. 1.00 is the legal limit and lower is better. On Hydro Multi-E the value applies to each CRE pump; the skid itself has no PEI.

Which Hydro Multi-E builds are DOE PEI rated?

The CRE 10, CRE 15 and CRE 20 builds, with PEI VL values from 0.38 to 0.45 depending on motor size and voltage. CRE 3 and CRE 5 are outside the DOE PEI scope, and CME pumps are not yet regulated.

Is Hydro Multi-E a good choice for a data center?

Yes for domestic water, cooling-tower makeup, humidification and water treatment up to 462 GPM: it offers N+1 duplex or triplex redundancy, multi-master control, BACnet IP or Modbus TCP through a CIM 500, and printed DOE PEI values. Above 462 GPM we would size an engineered package instead.

What warranty comes with Grundfos Hydro Multi systems?

Grundfos warrants U.S. consumer purchases for up to 30 months from the date of manufacture on the nameplate. Commercial purchases are covered under clause 10 of Grundfos US Terms and Conditions of Sale.

Does Hydro Multi-E include a pressure tank?

No. Grundfos recommends a diaphragm tank sized to the application, precharged to 0.7 times the setpoint, and lists a recommended minimum size for each pump family.

Can Hydro Multi-E draw from a tank or lift water?

Standard systems need a flooded or pressurized inlet. For suction lift, Grundfos fits the check valve on the inlet side as a factory option, and a level switch is available for tank or well sources.

Can I install a Hydro Multi outdoors?

No. Grundfos rates the system for indoor installation only, out of direct sunlight, at 32 to 104 F ambient with 3 ft of clearance on all sides.

How does Hydro Multi-E compare with the DuraMAC IQ1000?

Both cover roughly 160 to 460 GPM. Hydro Multi-E adds printed DOE PEI values and higher head; DuraMAC IQ1000 offers 3 in flanged stainless manifolds and Yaskawa control, and it is a line we stock in Houston.

Ready to Size Your Booster?

Send us your peak flow, the pressure you need at the top fixture, your inlet pressure and your voltage. We will come back with a sized selection, the matching tank and BMS module, and a factory submittal.

1-888.510.4036Sizing CalculatorEmail SalesRequest a Quote
Technical data on this page is taken from Grundfos product literature and is subject to change by the manufacturer. Confirm against the current installation manual before specifying.
Grundfos, Hydro Multi-E, Hydro Multi-B, CRE, CME, MLE, Grundfos GO and iSolutions are trademarks of Grundfos Holding A/S; A.Y. McDonald and DuraMAC of A.Y. McDonald Mfg. Co.; DAB and Esybox of DAB Pumps S.p.A.; Franklin Electric and SpecPAK of Franklin Electric Co., Inc.; all used here for product identification only.
Watermain Supply is a DBA of E4 Industrial LLC, an independent industrial supplier based in Houston, Texas.