Plumbing question.

[Pegasus2]

I recently moved into a new house. I'm experiencing a problem when a tap (hot or cold) is closed quickly. There is an almighty bang in the ceiling - I don't know if I'm correct but I think that the bang is caused by water pressure in the pipes.
There is no sound if the taps are closed slowly. How can this problem be resolved? Is there some sort of pressure release valve that can be fitted?

Any advice would be appreciated. Thanks.

 

[agentrfr]

It isnt from the pressure. It is from the momentum of water.

What the previous plumber has done is put a pipe in with a sharp turn against one of the roof trusses without fastening it. When water is flowing through the pipe(s) the water has some momentum as it reaches the pipe corner. When the tap is closed suddenly the water in the pipe needs to stop too (same thing happens in a car if you brake quickly) and the pipe which slightly? free to move smacks the truss in the roof.

Simply go up in the roof, find where it clangs and secure the pipe to the truss (or put something there to dampen the impact)

 

[riscbroker]

I have the same trouble in my house, but all the piping is well hidden behind cladding so I can't track down the offending pipe and secure it. Maybe introduce a relief valve of some sort?

 

[TEXTILE GUY]

Water hammer -

You could drain and refill the system or reduce your incoming pressure if you have a mains tap

 

[NiTeD]

Go up into the ceiling and investigate, a simple clamp bracket should be able to tie down the offending pipe.

 

[Rickster]

Dont slam the taps? lol.


We have the same issue and everyone knows not to slam the taps. Except for the domestic worker who cant seem to understand why she must not slam it.

 

[Zarkon]

It's a "loose" pipe,get in the ceiling make sure all pipes are bracketed correctly,especialy near the geyser,usually where the problem is.Fixed this issue before.oh and when u in there,check if the geyser tray is still fine,and the condition of the geyser,if its old or not.And if it doesnt have geyser blanket,get some it works very well in winter

 

[Pegasus2]

Thanks.........that's also what happens here, we close the taps slowly but ever so often we forget and the domestic couldn't be bothered.

 

[Pegasus2]

It isnt from the pressure. It is from the momentum of water.

What the previous plumber has done is put a pipe in with a sharp turn against one of the roof trusses without fastening it. When water is flowing through the pipe(s) the water has some momentum as it reaches the pipe corner. When the tap is closed suddenly the water in the pipe needs to stop too (same thing happens in a car if you brake quickly) and the pipe which slightly? free to move smacks the truss in the roof.

Simply go up in the roof, find where it clangs and secure the pipe to the truss (or put something there to dampen the impact)

Thanks. I'll check it out.