Installing PEX Tubing

Q: Should I be concerned about expansion and contraction when installing PEX tubing?


A: PEX expands and contracts at a greater rate than copper, so don’t install it too tightly and be sure to allow a little slack between fasteners. In fact, on long runs many professionals will include a loop to allow for contraction. The loop also provides some extra piping in case the installer needs some fudge room to make adjustments. When running the piping through framing, make sure the access holes are a little larger than the PEX to allow for expansion.

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