Bang when cold tap is turned on

[Wildfire]

In the last few weeks whenever I turn on the cold tap there is now a very big bang and even worse when the washing machine draws.

It's only started in the last few weeks so I'm not sure what has changed.

Any ideas?

I have isolation valves on the bathroom and kitchen (2 bed flat).

One of my mates is a plumber but he is stacked with work and has cancelled on me 3 times and the OH is keen to get this fixed. He reckons either a tap or the toilet may have a failing valve?

I'm going to try draining the system down and refilling and see if it helps.

[Wildfire]

RicksAlfas said:

Is it water hammer? It can start if the water board have upped the supply pressure.

Fit one of these onto the washing machine supply:
https://www.screwfix.com/p/thomas-dudley-ltd-dw660...

I have one near the stop cock, but it may have lost it's charge, although it may be beneficial to put one near the washing machine.

I'll have to get someone to test the pressure. I can't be sure whether the pressure has gone up recently.

[Wildfire]

It occurs on heavy draw of water (especially the washing machine).

I do get a little knock on turning off, but I know this is because the pipe clips under the landing have died and need to be re-done. This would necessitate the carpet being re-laid and I'm not going to do that around Christmas.

My mate reckons something has failed. I'm going to try and have a look tomorrow.

Anyone know how to isolate taps in the corner of a bath (1/4 lever turn) and how to test a toilet valve?

Edited by Wildfire on Tuesday 21st November 12:27