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Description
Grundfos CMB-SP 3 Series Booster Pump System
Please contact us regarding availability, as some models may need to be ordered from our supplier.
The Grundfos CMB-SP 3 Series is a range of compact, self-priming booster pump systems designed for domestic and light-commercial water supply applications.
Each system combines a Grundfos CMB-SP multistage pump with a Grundfos PM2 pressure manager. The PM2 automatically starts and stops the pump according to water demand and provides dry-running and anti-cycling protection.
Recommendation: Adding a pressure tank can reduce pump starts, reduce operating noise and extend the life of the pump. Select the required pressure tank from the dropdown menu.
A free three-way tee is supplied with any pump and pressure-tank combination.
Specifications
Model kW Amps Outlet Inlet Flow Rate Head [m] Controller
CMB-SP 3-28 0.50 3.1–2.8 1" M 1" F 50 LPM 20.5 PM2 – 1.5 bar
CMB-SP 3-37 0.50 3.1–2.8 1" M 1" F 50 LPM 27.7 PM2 – 1.5 bar
CMB-SP 3-47 0.50 3.1–2.8 1" M 1" F 50 LPM 34.9 PM2 – 2.2 bar
CMB-SP 3-56 0.67 4.4–4.0 1" M 1" F 50 LPM 42.1 PM2 – 2.2 bar
Common Specifications
- Supply voltage: 1 × 220–240 V, 50 Hz
- Maximum flow: approximately 66 L/min
- Liquid temperature range: 0°C to +60°C
- Sound pressure level: below 55 dB(A)
- Motor enclosure class: IP55
- Adjustable PM2 cut-in pressure
- Maximum system pressure: 10 bar
Features
- Compact, self-priming multistage design
- Automatic start and stop according to water demand
- Dry-running protection
- Anti-cycling alarm for potential pipe leakage
- Stainless-steel impellers, intermediate chambers and shaft
- Cast-iron pump housing
- Hard-wearing carbon and ceramic mechanical seal
- Suitable for generator operation
- Complies with AS/NZS 4020 requirements for products used with drinking water
Applications
- Domestic household water supply
- Pressure boosting from above-ground water tanks
- Pressure boosting from suitable below-ground water sources
- Mains-water pressure boosting where permitted
- Garden watering and irrigation
- General water transfer
- Light-commercial applications
Warranty: 2-year back-to-base warranty.




