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Expansion Tank

Chris S
Chris S Member Posts: 177
I'm looking for a supplier for a mount & flexible piping for an expansion tank. I remember seeing it here about a year ago. It was a mount that would hold an xtrol 30, with I think a SS flexible hose. I tried to search it, but did not find it. Anyone?

Thanks in advance



  • kcopp
    kcopp Member Posts: 4,386
    What I use.....

    is a drop ear 90 (pex x 1/2" FM)  that has 3 ears for heavy duty drywall screws. Watts makes them as well as Uponor....
  • hot_rod
    hot_rod Member Posts: 21,815
    here is a bracket

    that includes a double check valve and mounting hardware.

    It does require you use the Caleffi expansion tank with a straight BSP thread.

    The nipple on the tank is what pushes the check open when you screw it in, so it needs to be a tank with a straight thread and a gasket.

    To remove the tank you can open the check at the middle thread. This checks any pressure or fluid in the tank, the other 1/2 of the check keeps the pressure and fluid in the system, pretty slick for changing or checking an expansion tank without losing a drop of fluid.

    Caleffi #255007. I believe it has a 36" length stainless flex now instead of the original 18" length.

    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
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