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Thread: Air bleeder valves

  1. #1
    Join Date
    Aug 2017
    Location
    Calmar Iowa U.S.A.
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    114

    Air bleeder valves

    Hi all. Looking for recommendations for air bleeder valves to use on a 2" glycol header.

  2. #2
    Join Date
    Feb 2014
    Location
    west coast
    Posts
    353
    Hit up your local plumbing supply house. Just tell the what you need. Install it at the high point, with a valve underneath it. Id say even a 1” unit would be fine. You only need it to get system set up. Once you’ve bled the air, you shouldn’t need it again until you work on the system. At least, thats our experience. We keep valve closed for safety sake. Just use it when we open the piping or drain for any reason.

  3. #3
    Join Date
    Oct 2013
    Location
    Kentucky
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    563
    Quote Originally Posted by brain medicine View Post
    Hit up your local plumbing supply house. You only need it to get system set up. Once you’ve bled the air, you shouldn’t need it again until you work on the system.
    You should be able to pick up a cheap Watts option at the local Big Box. But for the forementiined reasons, I generally do not use one at all anymore. I personally opt to just add a 3/8 ball valve that I can manually bleed when needed. If you use a science broom (loop duct-taped to the handle) then you don’t even need to get out your ladder in most cases. If your super smart, you’ll add a hose barb and some clear PVC tubing to route the bleeding liquid back to a bucket for re-use.

  4. #4
    Join Date
    Nov 2009
    Location
    Moab, Utah
    Posts
    612

    Not required

    Quote Originally Posted by Richard Pivo View Post
    Hi all. Looking for recommendations for air bleeder valves to use on a 2" glycol header.
    Auto Air Vents are not required on a correctly designed and installed " Open Loop " type system where the return well is at atmospheric pressure.
    Nothing should air lock in this type of system in 99.99% of cases, and its about that simple.
    If you still feel the need to use them, you need to get the industrial type that the relief can be piped back into your return header, for every instance.
    This is another additional point of failure.
    They are only indicated in closed loop " Pressurized Return " systems.
    Chillers 101.
    Warren Turner
    Industrial Engineering Technician
    HVACR-Electrical Systems Specialist
    Moab Brewery
    " No Cell Phone Zone."

  5. #5
    Join Date
    Aug 2010
    Location
    Enterprise, Oregon
    Posts
    2,024
    At any high points in the glycol supply side, I install a 4" high stub facing up. Drill and tap a 1/8" NPT hole in the end cap and install a simple, ball-style bleeder valve. As others have mentioned, you'll rarely need to use the valves, and the stub works as a trap for any stray air.
    Timm Turrentine

    Brewerywright,
    Terminal Gravity Brewing,
    Enterprise. Oregon.

  6. #6
    Join Date
    Aug 2017
    Location
    Calmar Iowa U.S.A.
    Posts
    114
    thanks for the replies all. I already have vertical tees with ball valves with hose barbs at all the high points on the header. I was just thinking it might be nice to have an automatic bleed rather than manual.

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