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Uponor EP Manifold - Vent thread size

ewang
ewang Member Posts: 81
in Radiant Heating
I would like to install some automatic air-vent on my Uponor EP manifolds.

Any idea what thread type and size the vents are on these guys? Uponor's submittals don't show anything.
https://www.supplyhouse.com/Uponor-Wirsbo-A2670601-6-Loop-EP-Radiant-Heat-Manifold-Assembly-w-Flow-Meters?gclid=Cj0KCQiA6t6ABhDMARIsAONIYywyIaugw1XPO47xdBzJeFrN0FNrH49XIoQAETN_2D_XeQsDKxnxDpoaAm0gEALw_wcB

Comments

  • ewang
    ewang Member Posts: 81
    I called Uponor USA and surprisingly, they couldn't tell me what thread size it was and stated that they private label the manifold and parts from a manufacturer.

    Pretty disappointing and frustrating, since I have seen others mount automatic air vents on these manifolds, but admittedly I can't find a picture to prove it.... yet!
  • HomerJSmith
    HomerJSmith Member Posts: 2,635
    edited February 2021
    I haven't used plastic manifold for a boiler since InFloor's plastic manifold stations. Gasp.
    I ended up replacing them with Caleffi"s manifold stations.

    What I would do is take off the end of the manifold, top most cap, drill it for a 1/8" pipe tap in the center, tap it and screw a coin vent into it and put it back on the manifold. I would probably use Lock Tite for a thread sealant or teflon tape.

    You can screw in an auto vent if you want. Maybe a Caleffi hydoscopic vent.


  • ewang
    ewang Member Posts: 81
    edited February 2021
    @HomerJSmith It already has a manual "coin-vent" style manual bleeder, but I was hoping to screw in a Caleffi auto air vent....
  • HomerJSmith
    HomerJSmith Member Posts: 2,635
    You would have to pull out the guts for the bleeder and then tap the cap.

    https://www.supplyhouse.com/Caleffi-508013A-1-8-Automatic-Hygroscopic-Air-Vent
  • ewang
    ewang Member Posts: 81
    @HomerJSmith So I finally went downstairs and isolated the manifold, only to discover I can't unscrew the factory supplied bleeder. And at this stage of the winter, I think I'll leave sleeping dogs lay until spring.

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