Horn sound when hot tap is turned on

We keep getting a horn like sound from the pipe when we turn on the hot taps in both upstairs bathroom (mostly from here on shower and sink) and in the kitchen sink. It happens when we first turn it on, and we have to turn the pressure down for it to stop and slowly turn it up and then it's fine

we had the boiler serviced recently

Asked by Lianne on 21st Feb 2024
Expert Trade Answers
"It is usually caused by a faulty tap or valve, if you've got a dripping tap it might be the offender."
Answered on 28th Feb 2024 - Member since Feb 2024 - report
"Hello, sounds like it could be a couple of different things could be washers at each tap which causes vibration when using them which will make a horn like sound. Also could be loose pipework but that's normally a loud banging noise.

Hopefully this helps"
Answered on 21st Feb 2024 - Member since Feb 2024 - report
"The washer has gone in one of the taps will need changing"
Answered on 21st Feb 2024 - Member since Apr 2023 - report
"Possibly the washers on your taps, need changing.
Wouldn’t have anything to do with your boiler service."
Answered on 21st Feb 2024 - Member since Jan 2023 - report
"You need a pressure relief vale fitted in the system"
Answered on 5th Apr 2024 - Member since Jan 2024 - report
"Washer in the tap is gone. Either you need new washer or new tap"
Answered on 28th May 2024 - Member since Jul 2022 - report
"Sounds like water Hammer and its a relatively straightforward job to remedy"
Answered on 3rd Apr 2024 - Member since Jan 2024 - report
"If its an unvented system then this will be the expansion vessel which hasn't been set at the incoming water main pressure."
Answered on 1st Mar 2024 - Member since Aug 2023 - report
"Valve is passing somewhere in the property casing it to shoot water through at high pressure creating the noise"
Answered on 24th May 2024 - Member since Jun 2023 - report
"it might be the taps themself if they are full turn (washers in side) that can make the horrible sounds"
Answered on 14th Mar 2024 - Member since Mar 2024 - report
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