Grundfos CMB 5-46

Grundfos CMB 5-46 Booster Self-Priming Pump is a compact booster pump designed for domestic and light industrial use.


The booster unit consists of a robust multistage centrifugal pump and a generator friendly PM1 or PM2 pressure manager. The pressure manager allows the pump to standard stop automatically according to demand and protects the pump from dry running.

Grundfos CMB 5-46

Applications :

  • Mains water pressure boosting
  • Rainwater supply from above ground water tanks
  • Rainwater supply from below ground water tanks
  • Rainwater supply from other below ground water sources – dams/rivers etc.

Features and Benefits :

  • Self Priming
    With a suction lift up to 8 meters (self-priming up to 4 metres), the CM Booster Self Priming is ideal for pressuring water from above or below ground water sources
  • Robust design
    All wetted parts are made from high quality, corrosion resistant stainless steel to ensure the longest life possible
  • User-friendly interface
    The pump features a user-friendly interface with LED indicators displaying power status, pump running, alarm indication and pressure indication (excluding CMB-SP-1-36)


  • Controls :
    Type of connector: Type E/F (CEE7/7)
  • Liquid :
    Pumped liquid: Water
    Liquid temperature range: 0 .. 40 °C
    Selected liquid temperature: 20 °C
    Density: 998.2 kg/m³
  • Technical:
    Pump speed on which pump data are based: 2900 rpm
    Rated flow: 4.6 m³/h
    Rated head: 38.6 m
  • Installation :
    Maximum ambient temperature: 50 °C
    Maximum operating pressure: 10 bar
    Size of inlet connection: 1 1/4
    Pressure rating for connection: PN 10
  • Electrical data:
    Rated power – P2: 0.9 kW
    Mains frequency: 50 Hz
    Rated voltage: 1 x 220-240 V
    Maximum current consumption: 5.4-5.0 A
    Rated speed: 2750-2790 rpm
    Enclosure class (IEC 34-5): IP55
    Insulation class (IEC 85): F

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