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Mains water pressure

Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls

Last Post by heat-pump-newbie 4 years ago

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BridgetJohn

(@bridgetjohn)

Trusted Member Member

Joined: 5 years ago

Posts: 51

Topic starter 22/07/2022 7:51 am [#457]

when my air source heat pump was installed I think the cold water was no longer fed from a tank in the loft but fed directly from the mains. Does that make sense?
It now makes a lot of noise when the cold tap turns on and toilets flush, washing machine fills etc. As it turns off there is then a large clunk noise.
any thoughts how to solve this?
thanks

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Morgan

(@morgan)

Noble Member Member

Joined: 6 years ago

Posts: 704

23/07/2022 9:07 am

Check to see if you have a loose pipe where you hear the clunk you speak of. It’s very likely a result of the plumbing being diverted.

Retrofitted 11.2kw Mitsubishi Ecodan to new radiators commissioned November 2021.
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BridgetJohn

(@bridgetjohn)

Trusted Member Member

Joined: 5 years ago

Posts: 51

Topic starter 24/07/2022 9:16 pm

Thanks will do.
did anyone else find the system is over-pressured since the ASHP was installed?

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heat-pump-newbie

(@heat-pump-newbie)

Reputable Member Member

Joined: 5 years ago

Posts: 170

24/07/2022 9:28 pm

Hi @bridgetjohn

Yes ! We had a vented system prior to the ASHP, we now have an unvented system, so mains pressure in all the hot and cold taps. We have 2 loos, one is same as ever, the other sends a thud down the pipework when the flow shuts off. It's been suggested that the answer is to fit a different valve in that loo: a Thomas Dudley Hydroflow bottom entry ball valve !! It's been on my list of 'to do' items for months, meanwhile I've got used to it. Thanks for reminding me.

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