Sound when closing taps and flushing toilets returns after emptying system

[sjs2303]

Hi All,

I really need some advice on a home plumbing issue please.

We have a sound when closing taps and flushing toilets that started a few months ago.

I have tried many times to empty the system by closing off the mains inlet stopcock, opening all the taps, flushing the toilets, etc then closing them all, refilling the system, and finally opening the taps from the bottom of the house to the top to blow out the air. The sound disappears for a few days, but comes back.

It starts lower down in the house and taps and moves upstairs where the noise is very prominent after the flush on the toilet on the top floor.

This started after we had some work done on our boiler, but that doesn't have any issues.

Any ideas? Am I missing something when draining the system or refilling it?

Thanks,

Steven

 

[sjs2303]

Any ideas? Even the washing machine is knocking when drawing water now.

 

[Deleted member 120897]

You may have loose pipes, a loose jumper on the stopcock, the toilet fill valve could be on its way out, several avenues to explore I’m afraid.