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Mains water pressure

 
Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
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 BridgetJohn
(@bridgetjohn)
Trusted Member Member
Joined: 4 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
(@morgan)
Noble Member Member
Joined: 5 years ago
Posts: 700
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.
14 x 500w Monocrystalline solar panels.

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 BridgetJohn
(@bridgetjohn)
Trusted Member Member
Joined: 4 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: 4 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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