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Air Block in Pex Tubing

Post in 'The Boiler Room - Wood Boilers and Furnaces' started by BulldogAcres, Oct 10, 2011.

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  1. BulldogAcres

    BulldogAcres Member

    Joined:
    Feb 12, 2010
    Messages:
    59
    Loc:
    Northeast Washington State (Colville)
    My Pex Tubing is higher than my heat source. Will the circulation pump force out all the air in the Pex Tubing, or should I put some air bleeders on the high point of the return and supply Pex Tubing lines. The heat source has an air bleeder on it. Just to make things more clear, the heat source and pump are 3 feet lower than the radiant flooring.

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  2. Frozen Canuck

    Frozen Canuck Minister of Fire

    Joined:
    Dec 14, 2009
    Messages:
    858
    Loc:
    North central Alberta, Canada
    No down side to installing bleeders at high points

    When the system air, vapor locks it is real hard on components, pumps

    Auto bleeders are cheap compared to pumps etc
  3. Clarkbug

    Clarkbug Minister of Fire

    Joined:
    Dec 20, 2010
    Messages:
    1,051
    Loc:
    Upstate NY
    I agree with Frozen Canuck.

    Definitely put in some air bleeders. You may be able to purge the system with circs, but if you cant, then you need to go and put them in anyway. Might as well add them now and then use those instead of risking your pumps.
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