Toilet sounds like foghorn!


Postby Graeme49 » Tue Aug 10, 2010 3:14 pm

Hi my toilet cistern sounds like a fog horn when you flush it! It sounds like it is entraining air.
Any ideas?
Graeme49
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Joined: Tue Aug 10, 2010 3:10 pm

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Postby fastfixservices » Sun Aug 15, 2010 3:28 pm

It's almost definitely 'water hammer'.

Water hammer commonly occurs when a valve is closed suddenly at an end of a pipeline system, and a pressure wave propagates in the pipe. In this case the valve will be a float (ball) valve in the toilet cistern.

If the valve does not close properly, due to it being worn or debris in the valve, then the water pressure can cause an oscillation resulting in loud vibration, banging and sometimes high pitched 'screeching' noises. The effect is made worse if pipes are not correctly secured or clipped under floorboards or within walls etc.

The offending valve needs to either be refurbished or replaced.
fastfixservices
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Joined: Sun Aug 15, 2010 3:18 pm


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