JustAHomeOwner
Member
I put together a air test rig to make sure that some runs of Upnor pex with the expanding fittings and rings are holding tight before closing up the walls. I don't know which type PEX Sharkbite is (i'm waiting for a reply from them) but I think it's B or maybe C. Anyway, I used a poly coupling to join a small length of 3/4" Upnor PEX to a length of 3/4" Sharkbite PEX, then a poly elbow followed by a brass fitting that's capped. All of those fitting are 3/4" Upnor with the rings. It's been holding 90 PSI for 20 hours and survived sharp smacks to the fittings. I was under the impression that the Upnor fittings and rings would fail with other then PEX-A but so far, it looks fine. Is that a valid torture test?
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