Pump power rating too low??

29 Aug 2011
Reaction score
United Kingdom
To cut a loooong story short, my old pump went duff and was leaking to earth, blowing the RCD and various fuses. It was a Myson compact CP53. I went and got a replacement which is also a CP53... made by interpart. But on the highest power setting it's rated at 57W - the old pump was 104W.

The boiler does cut out now and then but I'm not sure it didn't before I changed the pump.

Does it matter that the new pump has such a lower power rating? The system has a pump (obviously!) and a three-way valve and services a ground floor with 5 radiators and a first floor with 5 radiators. Run off a Potterton Suprima 30-100 and the Potterton EP2 timer.

Would a system like that normally be fitted with a 57W pump?

Cheers fellas!
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