Hello, I live in a home that has PEX piping for all water pipes (PVC drains). As the weather has been getting colder I've noticed what I think are increased expansion/contraction noises in the PEX pipes in two locations in my home - kitchen and upstairs bathroom. The noise sounds like a clicking/dripping and only occurs after using hot water and gradually goes away over a 20-30 minute time period. My question is - are these type of expansion noises (if that's what it is - I don't have evidence of a leak anywhere) more common as the weather gets colder? In both cases the pipes are located in interior walls. I moved into the house in the spring and don't remember hearing these noises until the past month or so - as I said, coinciding with the weather getting colder. Any insight would be appreciated!
daisy821
Just went on a call like this the other day. it's probably not your PEX piping but your PVC piping that goes through stud plates that are drilled too small for the pipe going through it that is what is expanding due to the heat/hot water going through them and making noise.
Have somebody run hot water in the area that is making the noise and jump up in the attic/or basement and see if you can find the pipe / hole that is causing the problem
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