Air release ? in a converted gravity system

Discussion in 'HVAC Heating & Cooling' started by xjmllc, Oct 26, 2007.

  1. xjmllc

    xjmllc New Member

    Messages:
    17
    Location:
    Cleveland, O
    First off, forgive me if my terminology is off.

    OK, I had an original "gravity" boiler system. The old expansion tank was way up in the attic. The tank/leftover pipes are higher than any radiator. I'm concerned about the air trapped in these pipes without a radiator to bleed. Do I simply insert an air release valve like the Taco slimeline hy-vent model below. Please see diagrams.

    OLD SETUP

    [​IMG]

    NEW SETUP??

    [​IMG]

    http://http://www.pexsupply.com/product_dtl.asp?pID=4551&cID=305&brand=Taco

    [​IMG]

    thanks!!
    Last edited: Oct 26, 2007
  2. HvYhitter

    HvYhitter New Member

    Messages:
    2
    good question.. because you will never get the air out of the lines above the highest air vent in your system I am betting.
  3. xjmllc

    xjmllc New Member

    Messages:
    17
    Location:
    Cleveland, O
    I'm now almost certain I need to connect the pipes (based on the first picture above) it's a supply and return piping through the tank.

    Still, how do I remove this air in the pipes above the highest radiator (1 floor below)????

    1) Just connect the pipes

    2) Connect the pipes and add an air release in between them
    Last edited: Oct 26, 2007
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