pressure surge

Discussion in 'Pumps and Tanks Well Forum & Blog. Water is life.' started by louie 44, Oct 29, 2013.

  1. louie 44

    louie 44 New Member

    Oct 29, 2013
    Richfield Pa
    Hey everyone, have a 30 50 pressure switch, when the pump kicks on it produces pressure on cold side,
    just blows out like a air gun, it actually blew out toilet valve in tank.
    I have drained the pressure tank and its at 28 which is where it should be, anybody out there have any idea
    what may be and how to fix :confused:
  2. LLigetfa

    LLigetfa DIYer, not in the trades

    Feb 6, 2011
    NW Ontario, Canada
    Is it blowing out air? If so, I suspect you have a checkvalve at the tank and water falling back to the well creating a vacuum sucking air in. Was there a galvanized tank before with an airmaker/snifter?
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  4. johnjh2o1

    johnjh2o1 Plumbing Contractor for 49 years

    Aug 9, 2009
    I have never seen a pressure tank with a hot side.
  5. valveman

    valveman Cary Austin Staff Member

    Mar 15, 2006
    Pump Controls Technician
    Lubbock, Texas
    This seems to be a day in which many people are learning about the problems a second check valve in a pump system can cause.

    You probably have a bad check valve on the pump or a hole in the drop pipe. But it would not be getting air if you didn’t have an extra check valve, most likely above ground.

    Remove the above ground check valve. It is masking the real problem. Then if the pressure drops with the pump off and no one using water, the check on the pump or the hole in the drop pipe will need to be fixed.
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