Grundfos CMB3-37 Multistage Pump (Flow 85 LPM)

21.00 KGS
(12 reviews) Write a Review
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The Grundfos CMBasic is a compact booster pump designed for domestic and light industrial use. The booster unit consists of a Grundfos CM cast iron pump with stainless steel hydraulic components and 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 pump includes 1.2m cable with plug.

The Grundfos CM Booster with pressure manager PM1 is a compact booster set for water supply in domestic applications.

The pressure booster unit consists of a Grundfos CM pump and a Grundfos pressure manager PM1. The pressure manager allows the pump to start and stop automatically according to demand and protects the pump from dry running.

The CM Booster is very easy to install. When the booster has been connected to the pipework, it is all a matter of plugging the plug into a socket, and the system is operational.


  • Mains water boosting
  • Rainwater supply from above ground water tanks
  • Household water supply
  • Light industrial use


  • Robust Design 
    All moving 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, and alarm indication.
  • Protective features
    The pump incorporates a range of protective features such as dry run protection, thermal overload protection, cycling alarm and maximum continuous operation time - 30 mins (excluding CMBasic 1-36) to protect the pump and ensure a long life.
  • Easy installation
    The booster unit is a compact solution, which makes it suitable for most installations. Simply connect the inlet and outlet and you have a fully operational booster unit.
  • Integrated non-return valve
    Non-return valve for backflow prevention.


  • Power on indication
  • Pump running indication
  • Alarm indication
  • Dry-running protection
  • Free position in installation
  • Suitable for generator supply
  • Rotary outlet connection
  • Integrated non-return valve
  • Cycling alarm

12 Reviews Hide Reviews Show Reviews

  • 5
    Water pump

    Posted by Karlene L on 7th Mar 2023

    Great product easy to connect and works well. Would help if there were instructions on how to increase pressure.

  • 5
    Just Water Pumps are the best !!

    Posted by trina w on 26th Apr 2022

    I’m still giggling - went to pick it up from the post office. Had a “HEAVY” sticker on the box, staff went to grab a trolley, then we saw the note that said ‘just kidding!’ It was for the 6kg pump cover that was sent separately. We haven’t laughed so much in ages, thanks guys. Can’t recommend you enough

  • 5
    Great service and pump

    Posted by CHRIS B on 26th Apr 2022

    Website was great and I really found the combination of info, response time and delivery to be perfect

  • 5
    Excellent service on the phone and advice. Pump arrived promptly. Only thing I would change is that some items, such as a 10mm Allen key that is required for installation, could be mentioned earlier, rather than getting the pump and then having to go

    Posted by pat c on 26th Apr 2022

    Great Service

  • 5

    Posted by matt h on 9th Sep 2021

    Very happy with this pump, quiet, compact and supplies great pressure

  • 5
    Excellent quality at a discounted price

    Posted by Randal P on 11th Jan 2021

    Very nice quality pump, significantly quieter than the previous Bianco.

  • 5
    Great pump. Great customer service.

    Posted by Jodie C on 5th Oct 2020

    Great pump. Great customer service. The man I spoke to was very helpful in helping me choose the right pump for my needs. Thank you

  • 5
    Excellent service

    Posted by Simon H on 27th Jul 2020

    Excellent service, excellent pump

  • 5
    works good

    Posted by Paul M on 25th May 2020

    works as good as the one I have had for 15 years. no complaints.