Air chambers help water pressure?

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by Hologramdr, Mar 5, 2005.

  1. Hologramdr

    Hologramdr New Member

    Messages:
    3
    I am currently taking a home repair class on plumbing and the teacher said that air chambers will help increase water pressure as well as get rid of water hammer. Is this true? It doesn't seem to make much sense to me unless the difference is really small. Thanks.
  2. Plumber2000

    Plumber2000 Plumber

    Messages:
    196
    Location:
    Eugene, Oregon
    Air chambers do not increase the water pressure, they only stop water hammer.
  3. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    26,831
    Location:
    Cave Creek, Arizona
    aie chambers

    In a very small way, but they do not increase pressure, they can maintain it. In certain situations, namely a very long or small water main, when a faucet is opened quickly, the pressure can drop "momentarily" due to the inertia of the water. The air chambers, or an expansion tank, being partially filled with compressed air will try to release that pressure when the incoming pressure drops to zero. When they do that, it will eliminate a "reverse" water hammer when the water starts to move, and also keep the pressure constant during that period.
  4. proxybox

    proxybox New Member

    Messages:
    18
    Location:
    Los Angeles, CA
    I would use a water hammer arrestor

    I would rather use a water hammer arrestor than a air chamber. Air can be dissolved over time and reduce the amount of room that the water can 'move' when a valve is closed. Sioux Chief and PPP both make them.

    proxybox
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