Grundfos CM 3-37 Booster Pump

CMB 3-37


CMB PM is a compact booster suitable for water supply in domestic and light commercial applications. It is supplied with Grundfos PM1 or PM2 which automatically starts and stops the pump based on demand.

Suitable for.

  • Commercial water pressure boosting
  • Attic
  • Bathroom
  • Domestic water pressure boosting


The Grundfos CM Booster with PM1 pressure manager is a compact booster set for water supply in domestic applications. The pressure booster unit consists of a Grundfos CM pump and a Grundfos PM1 pressure manager. The pressure manager allows the pump to start and stop automatically according to demand and protects the pump from dry running.The Grundfos CM Booster is very easy to install. When the system has been connected to the pipes, it is all a matter of inserting the plug into a power supply socket, and the system is operational.

The Grundfos CM Booster with PM1 is mainly used for domestic and light commercial water supply or booster systems.



Pumped liquid: Water
Liquid temperature range: 0 .. 60 °C
Selected liquid temperature: 20 °C
Density: 998.2 kg/m³



Pump speed on which pump data are based: 2900 rpm
Rated flow: 3.1 m³/h
Rated head: 27.7 m
Code for shaft seal: AVBE
Approvals: CE,RCM
Return valve: YES
Start pressure: PM1 - 1.5 bar
Tank volume: NONE l



Pump housing: Cast iron, EN 1561 EN-GJL-200
Impeller: Stainless steel, EN 1.4301, AISI 304



Max. ambient temperature:
50 °C
Maximum operating pressure:
10 bar
Pipe connection standard:
ISO 228-1
Type of inlet connection: Rp
Type of outlet connection: G
Size of inlet connection: 1
Size of outlet connection: 1
Pressure rating for connection: PN 10



Rated power - P2: 0.5 kW
Mains frequency: 50 Hz
Rated voltage: 1 x 220-240 V
Maximum current consumption: 3.1-2.8 A
Rated speed: 2730-2740 rpm
Enclosure class (IEC 34-5): IP55
Insulation class (IEC 85): F
Built-in motor protection: TP 211
Length of cable: 1.5 m
Power plug: Australian plug



Grundfos CM 3-37 Booster Pump Brochure Grundfos CM 3-37 Booster Pump Brochure