Is there such a pipe, copper or otherwise, that doesn't matter if it
freezes? My pipes up to the upstairs bathroom run within an outside
wall, and while its inside the insulation it has frozen before, luckily
never burst, but I don't trust it to do that again!
I've not tried it, but since water reaches its maximum volume before it
freezes (ice floats), I've had the thought that a water hammer arrestor
would do the job, giving the water a place to expand before it freezes
water can freeze and break pipes.
I have never had it happen, but I have had a water filter break because
there was a little water left in it.
Supposedly pex will can tolerate freezing. Perhaps someone will elaborate
It may help in some cases, but often the arrestor is too far away. Water
expands 17% when it freezes and can easily do lots of damage.
PEX would be a better product in a potential freeze up though.
It's an old story... If you run pipes in an outside wall in a climate
subject to freezing, you're going to have trouble.
Best to relocate the pipes in the heated space and cover them with
insulation if there is any doubt.
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