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Cheers m8, I'll check them out tonight and will post the findings here 8)

Thanks M8 "zone valve or three port valve sticking" ... :? All I can see is two motorised valves near the pump,with one pipe in and one out each...so I'm not sure if there is a three way valve or a zone valve! Please forgive my ignorance on the subject :roll: Cheers

Hi Every time the hot water pump turns off, I get one very loud bang! It used to do it on speed 3 setting, I reduced it speed 2 and it stopped...two months later and it\\\'s doing it on speed 2 now ....help please. :!: