waterhammer

[piccadilly]

hi, i've noticed recently that when i flush the toilet, after the tank has refilled, there is a horrible noise, from the pipes, that sounds quite loud, i've looked it up on the net and it appears that it is water hammer, have any other people had problems alike this and what can i do about it?

[The Builder]

First thing may be to replace the ball valve in the WC cistern. Often, a worn valve will jump up and down on the seat under mains pressure.
If it's not loose pipework or worn valves, try fitting one of these:

http://www.toolstation.com/shop/p93058

[carlton23]

Excuse me asking a relevant question on your post, but my toilet cistern also gets a high whistling sound just as the cistern fills to the top and it`s done it ever since I changed a rubber flange several years ago and it has always annoyed me, especially during the night. The cistern is a sliding ball-cock type with a lever push.

[The Builder]

Hi Carlton ............ sounds like another in the repertoire of strange ballvalve noises.
Change the valve again. That's probably all you can do.

[carlton23]

Thanks Builder, I thought as much, but I`ll have to get a man in now.