Hot water tap noises

[QuizmasterG]

Whenever we turn off the hot water tap in either the bathroom or kitchen we get a hammering noise unless we turn off the taps slowly. I thought it might be an airlock (as suggested by several people) but a plumber tried the taps and said we needed to strip off all the tiles in the bathroom to find a loose pipe !!

The plumber hasn't the greatest reputation in our part of the world and was wondering if anyone else had a similar problem - and if it was was easily solved!

Thank you

[Old_Geezer]

Sounds like an airlock.

When I had one I simply connected a hose from the cold tap which was at mains pressure, to the hot tap which was at a lower presuure, and forced water back up the hot system until the overflow pipe had been pouring for a while. Seemed to clear it.

[The Builder]

OG's tip is something I've done a few times.......... that, and sticking my mouth over the hot tap and blowing :o)
Loose pipe maybe, but if not airlock, then water hammer. It's a simple job to fit an arrestor like this................

http://www.amazon.co....Water-Shock-Arrestor-
MBSP/dp/9792157751/ref=sr_1_1?ie=UTF8&qid=130
7974732&sr=8-1

[The Builder]

.............. or even this .................

http://www.amazon.co....qid=1307974732&sr=8-1

should work this time :o(

[QuizmasterG]

Many thanks to the Old Geezer and The Builder, I will try either or both!!

Will get my wellies out just in case!

Cheers

[johnk]

Be careful if putting the cold tap on the hot. If you have a tank upstairs or in the loft the flow into it via the hot will be under pressure and will fill the tank faster than the overflow pipe can empty it.

[AlBags]

Look .. It's water hammer causing a pipe to knock somewhere.
Also, if there is a delay before knocking while any water header tank is filling, try replacing tank ballvalve, replacing with a quiet fill valve (which damps down fill rate) or turning down mains stopcock to 1-1 1/2 turns open and retry.