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Plumbing

Clunking and whirring following new stop tap - HELP!!

Anonymous user 03/03/2024 - 3.37 PM

Hi. Firstly, thanks for looking at this and potentially helping me! Last week we had a new main stop tap fitted as the old one did not turn and it was concerning me that if we ever had an issue, I wouldnt be able to turn the water off! Since having the new tap, we get some funny noises, mainly clunking sounds when taps are turned off. We really noticed it when the dishwasher ran as we set it for the middle of the night and it woke us up! Having looked online, it seems this could be 'water hammer' - we didnt have an issue before the new tap! I also notice a loud clunk after flushing the upstairs toilet, after it has filled back up! Finally, when we run a bath now... we get a whirirng noise from a pipe that must go up from near the stop tap in the kitchen, to upstairs somewhere. If it helps, we have a water tank in the loft, hot water cylinder in airing cupboard, traditional setup for a 1930s house, I think. Plumber that fitted tap said try turning the stop tap down a turn, which seemed to stop the 'clunk' when the cold tap in kitchen is turned off but not the rest! Can anyone help??? I have read about draining the system but get conflicting results as to which 'faucets' to open, close, turn on, off and which order etc! Thanks in advance for any help with this!! The first response I have had suggests installing a hammer arrestor or pressure reducing valve. I am not sure why we have not had a problem before, would a new stop tap mean that we now need to have additional work done??

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3 Answers

Anonymous user

From your description all of the cold outlets including loo are from the cold mains. Mains pressure can be up to 5 bar pressure, Partly shutting the new stop tap will reduce the flow rate but not effect the pressure very much. option one fit a hammer arrestor above the stop tap option two fit a pressure reducing valve above the stop tap and set at approx 1.5 bar it is very possible the old stop tap was only in a slightly open position reducing the flow and effect of pressure, new tap fully open changes flow and pressure
Answered16 March 2021
5

Central heating and plumbing

No reviews yet

Aylesbury
I would fit a shock arrester on the incoming mains near the new stop cock. Hopefully this will resolve all the issues but without witnessing the issue I can’t guarantee it. Thanks
Answered16 March 2021
1

Jason Campbell Heating & plumbing

Rating: 5 out of 5
Duns
fit a shock arrestor
Answered16 March 2021
0