Clicking noise from pipe when turning on/off faucets

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JWBlue

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When a kitchen or bathroom faucet is turned on there is a clicking (that is the best way to describe it) noise coming from a pipe behind the wall in one of our bathrooms. It also happens when the water is turned off. When a faucet is turned on or off slowly it is does not occur as frequently. We had PVC pipes installed throughout the home a couple of years ago.

Water hammer was my first thought but I listened to videos on the internet and didn't sound anything like it.

I lowered the water pressure from 60 to 42 and it still occurs.

It seems to only be a cold water issue. When I turn on the cold water valve, I hear the noise. Not so with the hot water.
 

Smooky

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The cold water pipe is probably tight against the framing or some other item etc. When the pipe contracts or expands, it makes that clicking/ticking sound when it rubs against something like a tight hole in a wall stud.
 

JWBlue

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The cold water pipe is probably tight against the framing or some other item etc. When the pipe contracts or expands, it makes that clicking/ticking sound when it rubs against something like a tight hole in a wall stud.

Thank you for the response.

If it matters the pipe is PEX and not PVC.

Is this an issue that needs to be addressed? Could it lead to something worse?
 

Flapper

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Is this an issue that needs to be addressed? Could it lead to something worse?
It's not likely to harm anything. Unless the sound is annoying enough to cut into the wall to resupport the tube, don't bother.
 
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