Reply To: Ticking and knocking in water pipes

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#293468
Anonymous

Plastics expand and contract quite a bit as their temperature changes. If the pipe is passing through holes in ceiling joists that aren’t perfectly aligned, so that the pipe is flexed and tight against the side of the hole, this squeaking, tapping, slide can be the result.

The only solution I know of is to open the ceiling, and loosen the pipes by enlarging the drilled holes they pass through.

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