467 reviews
Recommend this pump – This is our second Grundfos CM Booster pump. We already have one running water to our house from tanks and has never let us down after 7 years. The reset panel on the side has perished but has not affected the performance. I trust the Grundfos name as reliable where we have several submersible pumps as well. Won't buy anything else. Show details
Reviews with attachments
I installed a cm booster pump it is a really good pump and very easy to install, the boys at valley pumps and irrigation sorted me out fast an an easy process. Very knowledgeable people aswell. Show details
Great water pump, great pressure and quiet operation! Highly recommend the Grundfos CMB Model 3-37. Show details
Excellent pump. Always trust Grundfos. Very happy with the pump and working well Show details
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Excellent Grundfos pump!!! – We installed a Grundfos 1-36 pump to water our garden and high pressure hose. The pump has exceeded our expectations. The pressure is better than the mains. I highly recommend this pump!!! Show details
Great pump – Great pump, much quieter than my old pump, easy installation and has plenty of pressure to run my home. Show details
Latest follow-ups
Purchased a few days ago. It was a seamless to install being plug and play. So much more pressure and a constant flow which is great. None of this slowing pressure then a spurt of pressure. Love it Show details
Follow-up · Had it for a while and wish I had NOT bought it. Cycles every 30 to 60min. Has a usless check valve on it which allows water to backflow reducing pressure so the pump starts. MORE SO I Specifically asked if the pump was suitable for a holiday or FIFO workers house and if the cast iron ends were an issue if pump is not used for a few weeks and was… Read more
Excellent New GrundosX Pump – Excellent new pump GrundfosX with CM Booster PM1 controller. Plenty of pressure for rain water tank to garden, toilets and washing machine. Very little noise . Should be good for another 30 years. Show details · 1
Follow-up · Still running well from tank to two toilets , washing machine and outside tap to bush house. Had an inline filter added near two years ago. Excellent pump.
Positive reviews
Love only using and recommending Grundfos pressure pump to all of my customers. We recently fitted a grundfos cm booster and the customer couldn’t believe that it was physically a much smaller pump but it had much more pressure and flow and also much quieter then the old pump. Show details
When we decided to put more water tanks on the house there was no question about the pump we would use. We have had Grundfos pumps here and at a previous home and have never had any issues at all. The new pump was simple to set up and works perfectly as I expect it to do for many years to come. As far as I am concerned the only pump to use is Grundfos.
I had to replace my house water pump at very short notice, and the team at Think Water were fantastic in getting me sorted quickly with a Grundfos CMB5‑46. From install to operation, the pump has been excellent. The Grundfos unit is quiet, reliable, and delivers strong, consistent water pressure throughout the house. Build quality is solid and it… Read more
performs exactly as advertised. It’s been a stress‑free upgrade and a great example of why Grundfos has such a strong reputation. Highly recommended, and big thanks to Think Water for the prompt service and good advice.
Negative reviews
Pump goodness – Good and powerful. Quite and going good compared with other Show details
Find out how Grundfos CM Booster compares to other Water Pumps
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Disappointed in length of time it lasted – Worked well but burnt out in approximately 6 to 7 years. However the agent looked after us when purchasing an identical replacement. Show details
Very disappointing – Our new Grundfos domestic water pump which was installed in our new house just over 3 years ago started leaking water badly. We took it in to be repaired to be told that it was unable to be repaired and that we need a new pump. Very disappointing. Not recommended. Show details
Recent reviews
Very happy with this pump so far. Installation and setup was straightforward and the build quality feels excellent. Pressure is strong and much smoother and quieter than my previous pump. Running a 2.5 bathroom house on rainwater tanks and it handles multiple taps/showers well. Paired it with a pressure tank and the system feels very stable with less cycling. Would definitely recommend for anyone wanting a quality household pressure system. Show details
We recently purchased our first Grundfos CMBooster pump and could not be happier. The service and guidance we received from our irrigation retailer led us to the Grundfos brand. The pump is exceptional! It is quiet, works seamlessly and in conjunction with a pressure vessel, the pump is providing us with amazing pressure which is well regulated.… Read more
The build quality of the pump looks to be top notch and installation / operation is simple. We couldn't be happier with our new pump and look forward to buying a second Grundfos pump shortly which will service our soon to be built, new inground house water tank.
I have installed a Grundfos CM Booster on our rainwater tank for the house.This is my second grundfos and am so pleased with rhe first one,I wouldn`t go any where else!!
Follow-up · Water pressure is good.I fitted a pressure tank to my pump,I find it helps with the drop. Installation was easy,fitted what was already there. Quiet,only hear it if you are really close.
Our previous Grundfos has proven to be a reliable water pump for the past 20 years and still going. We had no hesitation to replace with a Grundfos when we needed to upgrade to a bigger pump
Grundfos booster pumps provide the most effective pressure in my farm house. Can’t thank the Think water team enough for helping me with pump selection. Show details
Good price. Quieter than old pump, amazing flow. Really happy with my purchase Show details
Have installed 4 of these pumps around the property and home now, never missed a beat. The pressure is constant no matter the draw and has a great water head. Show details
Find out how Grundfos CM Booster compares to other Water Pumps
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Simple to install and much quieter than our previous davey we had. No complaints and very happy with it Show details
Awesome product and great service from Garth. Great quality product
Just installed this pump and it has been great, the last one was in use for almost 15 years so there was no question getting another one, runs great and super quiet.
This is a well-built quality good looking unit. It's a lot heavier than I expected - very solid. Installation was simple. Upon switching on I had to do a double take as the pump was so quiet I didn't think it was running at first! much quieter than I expected, we got shown this model as it fit our description for the retic max flow and powerful. Show details
The Grundfos CM Booster has been absolutely everything we needed and more. From the moment it was installed, the difference in water pressure was incredible – it’s consistent, strong, and makes every tap in the house feel brand new. The pressure is fantastic, whether we’re running the shower, washing machine, or garden hose at the same time – no… Read more
more frustrating drop-offs or weak flow.
It’s also impressively quiet and smooth compared to other pumps we’ve used, and you can really tell the build quality is top-notch. The automatic controller makes it super easy – it just works when you need it to without any fuss.
Overall, this pump has exceeded expectations. Reliable, powerful, and well worth the investment – I couldn’t recommend the Grundfos CM Booster more highly!
These pumps are a well built quality unit. It's a little heavier that I expected - very solid. Installation was simple. The pumps are much quieter than I expected. The pump is boosting an 8” raw water line on a wharf to maintain water to 3 crib facilities with ease.
First impressions are that this is a well built quality unit. It's a lot heavier that I expected - very solid. Installation was simple. On switching on I had to do a double take as the pump was so quiet I didn't think it was running at first! But yes it was running, much quieter than I expected. Time will tell just how good it is but initial impressions are that it is worth the money. Show details
We installed our pump without any hassles. Works better than we expected and is proving to be a winner. Very pleased all round. Show details
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Hi Wayne, Thank you for taking the time to update your… Read more