Grundfos CMBE-1-44 Booster System Pump
Features
Inlet Size 1 Inch
Style GPM
8.8 Gallons
- Grundfos CMBE 1-44 - 1 HP Booster Pump (115V)
- Designed for water supply and boosting in domestic and light commercial applications
- Rated 8.8 GPM @ 85' Head* (Please See Documents For Sizing Information)
- Provides 20-50 PSI at 0-10 GPM; Provides 20-30 PSI at 0-15 GPM
- All-In-One Solution
- Includes pump, motor, tank, pressure/flow sensor, controller & check valve
- 1 HP MGE Frequency-Controlled Permanent-Magnet Motor (115V)
Here's supplementary content for the Grundfos CMBE-1-44 Booster Pump page — insert after the "Features" list, before the Grundfos company paragraph:
Understanding the CMBE-1-44: A True All-in-One System
What "All-In-One" Actually Means Here
Unlike a bare pump that needs to be paired separately with a pressure tank, sensor, and controller, the CMBE-1-44 integrates all of these components into a single unit — pump, motor, tank, pressure/flow sensor, controller, and check valve. This matters practically: it simplifies installation (fewer separate parts to plumb together), reduces potential failure points at component connections, and gives you a single warranty and service point rather than managing multiple manufacturers' parts.
Reading the Pressure and Flow Specs
The pump's performance changes depending on demand — this is normal and expected for any booster pump, but understanding the numbers helps set realistic expectations:
- 20-50 PSI at 0-10 GPM — at lower flow demand (fewer fixtures running), the pump maintains a wider, higher pressure range
- 20-30 PSI at 0-15 GPM — as more water is drawn simultaneously, available pressure narrows somewhat, which is physically unavoidable but still represents solid, usable household pressure
- 8.8 GPM @ 85' of head — this is the pump's rated flow capacity against 85 feet of "head" (a measure of resistance from elevation change and pipe friction), useful for confirming the pump can adequately serve a multi-story home or longer plumbing run
MGE Frequency-Controlled Motor: Why It Matters
The 1 HP MGE frequency-controlled permanent-magnet motor is a more advanced motor design than a standard fixed-speed induction motor. Frequency control allows the motor to vary its speed smoothly in response to demand, rather than simply switching on and off at full power — this generally means quieter operation, less mechanical wear from repeated full-power starts, and more precise, consistent pressure delivery.
Sizing: 1-Inch Inlet and What It Suits
With a 1-inch inlet, the CMBE-1-44 is sized for typical residential and light commercial water supply lines — matching common household plumbing without requiring a larger, more industrial connection. This makes it a straightforward retrofit for most single-family homes experiencing pressure issues, without needing to upsize existing supply piping.
Domestic vs. Light Commercial Applications
The CMBE-1-44 is explicitly rated for both domestic and light commercial use, meaning it's built with enough capacity and durability to serve not just single-family homes but also smaller commercial properties — multi-unit buildings, small offices, or similar settings with moderate simultaneous water demand beyond a typical single household.
Grundfos SCALA2 vs. CMBE-1-44: Which Fits Your Situation?
| Grundfos SCALA2 | Grundfos CMBE-1-44 | |
|---|---|---|
| Max pressure | 145 PSI | Up to 50 PSI (flow-dependent) |
| Application | Residential, compact, outdoor-ready | Domestic and light commercial |
| Design | All-in-one, self-priming | All-in-one with integrated tank |
| Best for | Homes needing strong, consistent pressure boost with flexible placement | Properties needing higher flow capacity or light commercial-grade reliability |
Not sure which unit best matches your home or property's water demand? Our technicians can evaluate your current pressure, fixture count, and building type to recommend the right pump — see also our SCALA2 Water Booster Pump page for comparison.
Professional Installation Matters
Because the CMBE-1-44 integrates directly into your main water supply and includes electrical, sensor, and control components, professional installation ensures the system performs to its rated specifications. Our licensed plumbers will:
- Evaluate your property's water demand, fixture count, and current pressure issues
- Confirm the 1-inch inlet is compatible with your existing supply line
- Install and wire the pump, integrating its built-in tank and controller
- Configure pressure and flow settings appropriate to your household or property
- Test performance across varying simultaneous water demand scenarios
Frequently Asked Questions
Is this pump suitable for a single-family home, or is it overkill?
It's well suited to single-family homes, especially larger ones or those with higher fixture counts, while also having enough capacity for light commercial applications if your needs are more demanding than a typical residential booster pump.
Do I need a separate pressure tank with this unit?
No — the CMBE-1-44 includes an integrated tank as part of its all-in-one design, eliminating the need for a separately installed pressure tank.
How is this different from a standard well pressure tank system?
This is a booster pump designed to increase pressure from an existing water supply (municipal or well), rather than a primary well pump system; it's typically installed downstream of your main water source to solve pressure delivery issues throughout the home.
Grundfos is the largest pump manufacturer in the world, based in Denmark, with more than 19,000 employees globally.
The annual production of more than 16 million pump units, circulator pumps (UP), submersible pumps (SP), and centrifugal pumps (CR). Grundfos also produces electric motors for the pumps as well as electric motors for separate merchandising. Grundfos develops and sells electronics for controls for pumps and other systems.
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