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Mounting a #90 - 14 Gallon Expansion Tank

1daveman
1daveman Member Posts: 32
in Radiant Heating

I received great advice from this forum about my radiant floor system, and one of the suggestions was to get an Amtrol #90 Tank. I purchased one and asked my plumber to install it. I thought we would use Unistrut and straps, but my plumber thinks it needs to be on a floor stand due to the weight. The room really does not have floor space; is there a way to safely mount this on a wall? If it needs to be on the floor, I did not see any floor stands made for this tank, I could probably custom make something, but would appreciate suggestions.

Comments

  • EBEBRATT-Ed
    EBEBRATT-Ed Member Posts: 17,006

    They make Expansion tank mounting brackets. Hold Rite is one name I think there are others. Supply House .com has some. Others will comment.

  • 109A_5
    109A_5 Member Posts: 2,004

    Maybe nicely encourage the plumber to read the manufacture's documentation.

    image.png
    image.png

    I would ensure the pipes the EX-90 is attached to are adequately secured to the structure.

    National - U.S. Gas Boiler 45+ Years Old
    Steam 300 SQ. FT. - EDR 347
    One Pipe System
  • mattmia2
    mattmia2 Member Posts: 11,354

    the sx30v is the floor mount version of a 14 gallon tank. it can hang from the fitting but you must support the pipe. if failed and water logged it could weigh 100#. under normal operation it would be under 50#.

    you could also use this style mount:

    https://www.supplyhouse.com/Flamco-F97977-Flamco-Flexconsole-1-2-x-1-2-x-1-2-NPT-Steel-Red

  • 1daveman
    1daveman Member Posts: 32

    Thanks I will suggest that mount and show him the instructions!

  • hot_rod
    hot_rod Member Posts: 24,118

    that could be 60 lbs or more if it water logs

    Some all thread with unistrut to support it would work

    Plenty of tanks mounted horizontally, as the Amtrol book shows. Suspended it like you would a compression tank

    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
  • mattmia2
    mattmia2 Member Posts: 11,354
    https://forum.heatinghelp.com/discussion/comment/1838212#Comment_1838212

    14 gallons at 8#/gal is about 110# if it waterlogs. I don't know what the weight rating of a 1/2" pipe nipple is but the instructions seem to imply it can be supported by the nipple. I wouldn't do it in any position other than vertical with the nipple up.

    hot_rod
  • hot_rod
    hot_rod Member Posts: 24,118

    Here is what Amtrol shows in their Engineering Handbook. I have seen tanks installed on their side like this for many years. No evidence that it shortens their lifespan?

    The Extrol Pro, a lined tank, is available up to a #60

    Screenshot 2025-01-27 at 9.02.22 AM.png

    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
  • 1daveman
    1daveman Member Posts: 32

    Great thanks so much.

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