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There is an area in the pipe where some air is trapped or the pipe is exposed. The momentum of the water moving through the pipes continues to move the water forward after the valve is shut. This momentum can compress a pocket of air making a sound or it can cause a column of water to rise in a nearby pipe, which will make a clunk when it falls back to its normal level.
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∙ 12y ago
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What would cause noise in water pipes even when no water is turned on or off?
Depending where the noise was coming from, but this question is most likely to be answered in this way. If you switched a valve off and the noise was coming before the valve in the pipes, that would indicate a burst pipe.
What could be the problem if you hear a loud noise coming from the water pipes in your house?
This is most likely to be water hammer. The most likely reason is because a pipe has not been held down properly with a pipe clamp. It normally happens when a toilet is filling up or when taps are switched off suddenly. Its due to the water pressure in the pipes that makes the water rebound in the pipes causing them to rattle and make a noise
What causes the water pipes to hum when turned off?
choir members in your pipes
Will PVC pipes burst if water off?
No
Should water meter be turned off if pipes are frozen?
If pipes are frozen no water can flow, so water meter shouldn't be registering anything. But if pipes are frozen it's a good idea to turn the water off at the inlet. That way you have a chance to discover and leaks and damages when the pipes thaw w/o getting the whole place flooded.
Why does your car clunk when you take off from a stop?
It shouldn't ...
Why when i take off clunk?
You may have U-Joint problems
What is the metallic clunk when you let your foot off the gas?
U joint
Why does it sound like pipes rattling when turning the water off in your house?
I believe it is due to the pressure build up within the pipes once the water is turned off. I know they sell a product that you place in one of your pipes that serves as a buffer to stop the rattling.
What is the thud sound when you turn on or off the water?
That is your pipes hitting walls or boards. The pipes will move if not properly secured when pressure is removed and applied to them. This pressure change occurs whenever you turn a faucet on or off.
When working on plumbing pipes do you have to shut off the hot water heater as well as the main?
No. The Main is source of water for that as well.
What will happen if the main water pipes break?
Water will run until a valve or pump is shut off upstream from water main break.
