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Question DetailsAsked on 4/1/2016

Clicking sound behind sink wall that starts after the water runs several seconds and continues after water is off

When sink runs for several seconds there starts a clicking sound behind the wall (sounds like a clock second-hand) and sound continues for several seconds after water is turned off

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1 Answer


Here are links to several previous similar questions with answers - in most cases this is thermal expansion and contraction of pipes creaking or clicking as they move past tight spots in walls or floor joists or such. Sometimes seasonal, sometimes only with either hot or cold water (in which case is usually that temperature water pipe), if happens with both hot and cold usually drain pipe moving. Especially with plastic pipe as it tends to "stick" where it rests on wood or plaster and then "jumps" a bit as it expands or contracts.

Put your ear to wall or vanity and listen carefully while it is doing it - if a leak will generally sound "wet" - if an expanding pipe will generally sound plastic or metallic. Also - if expanding pipe, when it is doing it if you gently push and pull the pipes around a bit under the sink if it changes tone or frequency then expansion/contraction - ditto generally if happens more with hot water than with cold, as that makes the pipe expand more.

You could try stuffing some batting or cloth around the pipes where they penetrate the wall or back of the cabinet to see if that is the source of the sound - otherwise if in wall not much you can do unless you tear into the wall.

Answered 4 years ago by LCD

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