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What is this Thrush component?

hot_rod
hot_rod Member Posts: 16,518
Single pipe connect at bottom
Bob "hot rod" Rohr
trainer for Caleffi NA
Living the hydronic dream

Comments

  • EBEBRATT-Ed
    EBEBRATT-Ed Member Posts: 12,133
    looks like an expansion tank
  • hot_rod
    hot_rod Member Posts: 16,518
    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: 1,206
    Maybe used to add more mass to the system like a reservoir tank.
  • ScottSecor
    ScottSecor Member Posts: 552
    @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?
  • 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!
    Often wrong, never in doubt.
  • Ironman
    Ironman Member Posts: 6,890
    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: 6,890
    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: 16,068
    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: 1,896
    I am surprised the last installer reinstalled it... I was impressed with Thrush equipment , well made ...
    I have enough experience to know , that I dont know it all