Air Control Valve

Discussion in 'Pumps and Tanks Well Forum & Blog' started by Chrisw1958, Mar 16, 2010.

  1. Chrisw1958

    Chrisw1958 New Member

    Messages:
    4
    Location:
    Kenner
    What is a air control valve and what does it do on a bladderless tank? Is it mandatory?
  2. nhmaster

    nhmaster Master Plumber

    Messages:
    3,189
    Location:
    S. Maine
    It maintains the air cusion in the top of the tank and no, it's not strictly mandatory but without it you will have to drain the tank and re-establish the air cusion a couple times a year or more.
  3. cacher_chick

    cacher_chick Test, Don't Guess!

    Messages:
    3,246
    Location:
    Land of Cheese
    There is more than one type of setup. Peter is referring to one that allows air INTO the tank. When the air bleeders are in the well, a float-style AVC works to allow the excess air OUT of the tank.
  4. nhmaster

    nhmaster Master Plumber

    Messages:
    3,189
    Location:
    S. Maine
    yes, I forgot those. But nobody has uses that set up around here.
  5. Texas Wellman

    Texas Wellman In the Trades

    Messages:
    532
    Location:
    SE Texas-Coastal
    They are quite common in this part of the country. Most of the wells around here use regular galvanized tanks, probably 2:1 or more. If you see a sub/galvanized tank, it probably has a bleeder.



  6. Chrisw1958

    Chrisw1958 New Member

    Messages:
    4
    Location:
    Kenner
    This had a steel tank and whenever the pump shut off it made a little pffft sound. My boss put in a bladder tank and it is getting air probably from the well as I have learned here. I guess we need to go back with a regular tank but I wondered where to buy the float style avc? Where do you get galvanized tanks all I see is steel with epoxy liner?
  7. Chrisw1958

    Chrisw1958 New Member

    Messages:
    4
    Location:
    Kenner
    What is 2:1 or more mean?
  8. cacher_chick

    cacher_chick Test, Don't Guess!

    Messages:
    3,246
    Location:
    Land of Cheese
    Epoxy lined is the "new and improved" galvanized-style tank.

    The AVC is Grainger part# 7P020 . Probably also available at any good plumbing wholesaler.
  9. Texas Wellman

    Texas Wellman In the Trades

    Messages:
    532
    Location:
    SE Texas-Coastal
    Ratio of galvanized tanks to bladder tanks. For every 1 bladder tank in this area there are probably 2 galvanized regular tanks.
  10. ballvalve

    ballvalve General Engineering Contractor

    Messages:
    3,261
    Location:
    northfork, california
    Sears online sells some big glasslined tanks quite cheap.
  11. nhmaster

    nhmaster Master Plumber

    Messages:
    3,189
    Location:
    S. Maine
    Funny how they do different things in different parts of the country. Nobody installs non bladder air tanks up here. I have not used one in better than 30 years. Doubt I could even get one from my wholesaler unless I special ordered it.
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