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rockies
Member
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# Posted: 8 Apr 2016 18:08
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Has anyone used this for their hot and cold water pipes? I read that you have to make sure that the pipe is rated for "potable water". (This is just a sample article with some info about the piping).
http://www.builditsolar.com/Experimental/PEXCollector/PEXALPEX.htm
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Don_P
Member
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# Posted: 8 Apr 2016 21:41
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I've used it for radiant slabs... what is the reason for using it for supply plumbing, you're paying for the aluminum layer that you don't really need.
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rockies
Member
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# Posted: 8 Apr 2016 21:55
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Won't the aluminum layer add strength to the pipe in case of a split from either a pressure change or a cold snap?
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MtnDon
Member
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# Posted: 8 Apr 2016 22:26
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We've had our cabin PEX freeze once. No damage.
Install a pressure limiting valve of you are concerned about excessive pressure if on a municipal line. If on a well just set the pump pressure.
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Don_P
Member
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# Posted: 9 Apr 2016 08:53
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I doubt the aluminum layer adds much if anything to split resistance, think tin foil, that's all it is. It was added as an oxygen barrier for hydronic systems.
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creeky
Member
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# Posted: 9 Apr 2016 11:03
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It would appear that the aluminum layers actually reduce the ability of PEX to survive freezing/thaw cycles.
Great link above.
Personally, I've frozen my non-al PEX a few times. The problem isn't the PEX. The problem lies in the fixtures. Valves. Metal pex bands and brass connectors. Water heaters. All far more expensive than the tubing.
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