Grundfos CM Booster PM1

Grundfos CM Booster PM1


Dwelling Size Number of Taps Pump Model Recommendations
Small House 2-3 taps Grundfos CMB 1-36
Medium House 3-4 taps Grundfos CM Booster 3-37, Grundfos CM Booster 3-46
Large House 4-5 taps Grundfos CMB 5-46
Large House

(long runs of pipe)

5-7 taps Grundfos CMB 5-46
(Taps are 15 l/min at 22.5 m head, please note: pipe friction and other factors will affect this)


Grundfos CMB Spec Sheet


  • Mains Boosting
  • Water Pressure boosting from tanks above the pump or where the pump would be level at the base of the tank. This pump cannot suck from below it.

Price includes GST and is freight free within North Island and South Island of New Zealand

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Grundfos CM Booster

Domestic Multistage Pressure Booster Pump

The Grundfos CM Booster range is an excellent choice if your water source is above your pump or if your pump would be in-line with your tank. They are high quality pumps made out of stainless steel. This range is the successor of the Grundfos CH pumps. In terms of quality and reliability, they are a fantastic option” – Jared, team member here at McQuinn Pumps.

Here’s what we think you might like about this pump:

  • It’s designed and built to suit industrial applications. This means it can manage the water supply for a large home or increase the pressure of the water coming from the mains well. This is dependent on the model, as there are several different models in the CM Booster range.
  • It’s quiet, clocking in at just 55 db, which is comparable to the noise of a dishwasher running. It won’t make a lot of noise that could disturb you, your family, or your neighbours.
  • It’s easy to install. Just connect the pump to your pipes, get the pump primed, plug it into an outlet, and it’s ready to start pumping.
  • It’s built to last. The pump is made from heavy-duty cast iron and stainless steel parts, so it’s really sturdy and durable.
  • The pump comes with a Grundfos PM1 Pressure Controller.

The PM1 takes the guesswork out of managing your pump. It automatically turns the pump on when you open a tap and shuts it off when you’re done. The PM1 also comes with basic safety features that protect your pump from running when no water is detected (run dry protection). They also have a built in non-return valve.

One thing to keep in mind with the Grundfos CM Booster range is that they cannot lift water from below where the pump is installed, they will only pump if the water source is above the pump or is level with the tank on ground level. The Grundfos CM Booster SP or the Grundfos JP range are appropriate for that application, as they can suck water up to them (please check them out for specifics).

Here’s what other customers like about this pump: click here to read updated customer reviews


Pump Curve of the different models:

How does a pump performance curve help me? Here is a simplified explanation:

A pump curve shows you what a pump is capable of – how much water it can move (flow) and how high it can lift it (pressure). The horizontal line on the chart is for the water flow, and the vertical line is for how high the pump can push the water. But remember, the pump’s job gets tougher if it needs to push water up high or through filters, fittings and pipework that create friction or drag. This ‘eats up’ some of the capacity, meaning the actual outcome at your tap could be different. The pump curve can be your initial starting guide to finding a pump that’s strong enough to give you the right water pressure and flow, after all these factors come into play.

Dimensions & Physical Attributes:




Operating Conditions & Technical Data:


If you have any questions on this product, don’t hesitate to contact us for help with finding the right product or variant for your application. If you are local, pop into our store to see our pumps on display, and to have someone assist you in finding the right sized pump for your set up. We are located at 72 Kioreroa Road, Whangārei 0110. If you are not local and have a question, you can fill out the form below.

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Additional information

Weight N/A