water contamination

robsouth wrote:

wny_pat wrote:
I know a plumber who keeps sealed up samples, filled with water, samples in his freezer. He uses them to demonstrate how they don't freeze and bust when frozen.

I can testify first hand that pex will freeze and burst.

Nothing is Freeze Proof. However, PEX Pipe is Freeze resistant. PEX Pipe will actually expand with the ice and retract upon thawing. In situations where copper or CPVC would burst the PEX will not. And I know where 4 pieces of capped PEX filled with water are kept in a full size freezer set a 0 degrees f. The only time they are removed is when they are taken to a customer for demonstration purposes. They have been maintained that way for several years now.
Apollo PEX FAQs