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What is this Thrush component?

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hot_rod
hot_rod Member Posts: 22,264
Single pipe connect at bottom
Bob "hot rod" Rohr
trainer for Caleffi NA
Living the hydronic dream

Comments

  • EBEBRATT-Ed
    EBEBRATT-Ed Member Posts: 15,631
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    looks like an expansion tank
  • hot_rod
    hot_rod Member Posts: 22,264
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    It does have an old steel compression/expansion tank above.
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
  • EzzyT
    EzzyT Member Posts: 1,296
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    Maybe used to add more mass to the system like a reservoir tank.
    E-Travis Mechanical LLC
    Etravismechanical@gmail.com
    201-887-8856
  • ScottSecor
    ScottSecor Member Posts: 863
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    @hot_rod where does the supply pipe come from on the boiler? I notice the circulators are pointing upwards, but I can't see how they get fed. Is that a bleeder facing us on the Thrush tank?
  • Alan (California Radiant) Forbes
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    Good eye, Scott. It looks like the supply comes out of the boiler, goes into the Thrush device and the comes out the back to feed the circulators.
    It's a pass-through expansion tank!
    8.33 lbs./gal. x 60 min./hr. x 20°ΔT = 10,000 BTU's/hour

    Two btu per sq ft for degree difference for a slab
  • Ironman
    Ironman Member Posts: 7,379
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    I've seen pass through compression tanks like that which had baffles to separate the air, but if there's a tank above, I can't see what function that would have.

    Maybe @DanHolohan would know?
    Bob Boan
    You can choose to do what you want, but you cannot choose the consequences.
  • Ironman
    Ironman Member Posts: 7,379
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    Does it have a number on it?
    Bob Boan
    You can choose to do what you want, but you cannot choose the consequences.
  • DanHolohan
    DanHolohan Member, Moderator, Administrator Posts: 16,548
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    I’ve seen those. Combo air separator/compression tank. A product that didn’t live up to its hype.
    Retired and loving it.
  • Big Ed_4
    Big Ed_4 Member Posts: 2,806
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    I am surprised the last installer reinstalled it... I was impressed with Thrush equipment , well made ...

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