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radiant tubing

creger.robert Member Posts: 38
edited December 2021 in Radiant Heating
What is the most flexible tubing out there for heating-radiant-on the market
also does anyone offer a quick connect fitting type to not lose fluid


  • Larry Weingarten
    Larry Weingarten Member Posts: 3,237
    Hi, There has been rubber tubing, but it hasn’t held up well in the long term. PEX can flex more or less depending on size. I’m wondering what job do you have in mind? With that info, we probably can help you better. Fittings depend on the tubing, so can’t answer that question yet. B)

    Yours, Larry
  • creger.robert
    creger.robert Member Posts: 38
    edited December 2021
    its a trial job heating some igloos trying to see whats out there
  • kcopp
    kcopp Member Posts: 4,394
    PERT tubing where not as popular is more flexible. Hydronic Alternatives has it. i think you can also get it from supplyhouse.com
  • Erin Holohan Haskell
    Erin Holohan Haskell Member, Moderator, Administrator Posts: 2,262
    REHAU has a RAUPEX SPEED radiant system here: https://www.rehau.com/us-en/raupex-speed
  • hot_rod
    hot_rod Member Posts: 21,866
    The A pex are more flexible, it has to do with the method of cross-linking. B pex is cross-linked after coiling and tends to want to stay in a coiled shape :)

    Mr Pex has long advertised the most flexible pex.

    PERT is an option but does not have the same ratings as pex.
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
  • Zman
    Zman Member Posts: 7,543
    I am not sure how I feel about radiant heat in igloos, they may lose some headroom over time. :#
    Sounds like an interesting project.
    "If you can't explain it simply, you don't understand it well enough"
    Albert Einstein
  • Dave H_2
    Dave H_2 Member Posts: 545
    Use the smallest diameter pex you can get; the smaller, the more flexible.

    Know your math, flowrates and length. Then you can use the charts from the manufacturer to find head loss and therefore design the rest of the system.

    Dave H
    Dave H
    Alan (California Radiant) Forbes