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Thread: Expansion Tank

  1. #14
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    67,708
    I learned to carry a Taco tank valve for the ones without an air vent and just a drain cock.
    I've installed quite afew of them, and then drained the tank.

    In my early years, I drained more then one by the boiler drain though. PITA
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  2. #15
    Join Date
    Mar 2005
    Location
    Suppy NC
    Posts
    4,513
    not many left arround here. At least i havent seen but one in two years now

    those tanks IMO were great compared to the diaphram tanks

  3. #16
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    67,708
    I hated bladder tanks at first.

    But since I can change out a bad resi bladder tank faster then I can drain a steel tank.
    I can't imagine installing a steel tank.
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  4. #17
    Join Date
    Nov 2007
    Location
    Washington State (on the Peninsula)
    Posts
    80
    Quote Originally Posted by monterais View Post
    Where do you install the expansion tank , in the return or supply side of the boiler. I am an apprentice and install boilers with my boss. I was taught that they go in the return side but he says the supply. He's the boss so I do what he tells me and dont argue.
    I always install them on the supply side of the boiler.

  5. #18
    Join Date
    Mar 2008
    Location
    Central NH
    Posts
    137
    The tank always goes before the circirculator. Which side of the system you are on (supply/return) depends on if you are pumping towards or away. Each set up has its own set of advantages and disadvantages.

  6. #19
    Join Date
    Feb 2007
    Location
    Cape Cod Mass
    Posts
    14
    I run the tank on the supply side of the boiler on the units that have the circ. on the return, I have seen it done every which way on jobs that others installed

  7. #20
    Join Date
    May 2006
    Location
    Rochester, NY
    Posts
    22
    Pick up the book, "Pumping Away" by Dan Holohan. It has a wealth of information regarding piping options for hydronic systems. Lots of diagrams too.

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