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  • Air bleeder valves

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

  • #2
    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.

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    • #3
      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.

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      • #4
        Not required

        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
        The Thought Police are Attempting to Suppress Free Speech and Sugar coat everything. This is both Cowardice and Treason given to their own kind.

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        • #5
          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.

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          • #6
            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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