Noisy cold water pipes?????

[markyb]

hi all,
I had a new boiler fitted at the end of last year. Over the last couple of months, when we flush the toilet, the cold water pipe makes a horrible noise . You can make it worse by turning the cold water tap on. It only lasts as long as it takes to fill the cistern, then it goes quiet. No other use of the cold water system causes the problem.
Just wondering if there is some sort of damper that can be fitted into the cold water system to stop it?
Or if someone can tell me what is causing it?.
Cheers
mark.

 

[Bowsy]

Just replace the Ballvalve in the toilet cistern......