re: Busted/Frozen Pipe Check In

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Pex won’t bust but can still freeze and leave you with frozen water pipes, right?

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During the February 2021 polar vortex, even experienced plumbers still falsely believed that PEX is immune to bursting when frozen. When confronted with these real world failures they have raised any number of mistaken explanations ranging from “it wasn’t the ice, someone must have used a heat gun on it” to “that must be a different kind of PEX, my PEX will expand better.”

The fact is that PEX bursts when it freezes, just like copper and CPVC. No material can overcome the incredible power and pressure involved in freezing. The only reliable way to prevent a pipe from bursting when frozen, is to prevent the pipe freezing in the first place.

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