Discuss Noisy ch pump in the Central Heating Forum at Plumbers Forums; Scottish gas fitted a new condensing boiler into our ch system two years ago. We had problems with "rushing water sounds" when pump started and banging and knocking noises up ...
Scottish gas fitted a new condensing boiler into our ch system two years ago. We had problems with "rushing water sounds" when pump started and banging and knocking noises up until the pump was replaced last February. We were told to keep venting the radiators for a few days (it took some weeks), however when the pump starts up now it sounds like stones or grit flushing through. On sounding the pump with a long screwdriver between ear and pump body the noise is in the pump. On Friday Scot. Gas carried out a safety check and the gentleman said he thought it could be a stone/s but fixing it was not covered by my maintenance agreement. I fitted the ch system myself 28 years ago and have had little or no problems over the years, the last two have thrown up a succession of niggly problems, this one is annoying.
could be corrosion or cavitation if not a sealed system please clarify
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