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air test pex pipe

heatingdpeng Member Posts: 35
I am using manifold to connect three set of pex pipe, try to air test them, but do not work, can someone tell me how to connect the pex pipe, and run the air test ? thanks


  • Snowmelt
    Snowmelt Member Posts: 1,276
    sounds like you need some real help if you dont know how to perform a simle air test
  • Larry Weingarten
    Larry Weingarten Member Posts: 2,149
    Hello: Can you give us a little more detail on what isn't working? You should be able to get a threaded fitting installed so you can hook up a test gauge like is pictured. Does that help?

    Yours, Larry
  • hot_rod
    hot_rod Member Posts: 14,786
    Does the manifold have air vents on it? if they have float type air vents you need to seal the cap to get an air test to hold.

    If by chance it is a Caleffi brand, you need to use the black plastic caps to air test. the brass caps are hygroscopic and only seal when they get wet.

    The gauge Larry shows will work on any system that you can adapt it to.
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
  • Kakashi
    Kakashi Member Posts: 88
    Fill them up with water?
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