Leaking Check Valve Question

Discussion in 'Irrigation' started by MEXANDME, Sep 8, 2011.

  1. MEXANDME

    MEXANDME LawnSite Senior Member
    Posts: 396

    I have a customer whose check vave is stuck open. The pump is a 1 HP above ground and the water source is a community pond. When I prime the pump; I am getting 23 gallons per minute with a bucket test. But, as soon as you turn off the pump, you can see the water level at the pump immediately disappear.

    The faulty check valve is about ten feet out into the pond under about three feet of water and will be very difficult (but not impossible) to replace.

    My question is this. Can I install an additional check valve back up on the bank (underground) and just leave the faulty one where it is?

    FYI, the suction line is 1 1/4" PVC.

    Thanks,

    Mex
     
  2. Mike Leary

    Mike Leary LawnSite Fanatic
    Posts: 21,775

    I always thought that was called a "foot valve".
     
  3. MEXANDME

    MEXANDME LawnSite Senior Member
    Posts: 396

    Mike,

    In this case it is actaully a check valve. The is ten feet of well strainer beyond the check valve. The check valve was actaully on land several years ago when installed but the lake has risen significantly since then.

    Thanks,

    Mex
     
  4. Mike Leary

    Mike Leary LawnSite Fanatic
    Posts: 21,775

    Hmm, maybe someone else has a clue, but every pond system I've ever dealt with had a foot valve, period. They needed to be serviced every few years, but the sites I serviced had a buoy marking the location. and a rowboat.
     
  5. Wet_Boots

    Wet_Boots LawnSite Fanatic
    Posts: 46,943

    You can have a check on the pump inlet. I never use a foot valve if I can do without one (pump lift of 5 feet or less) because I want to be able to drain the suction line without removing it from the pump.
     
  6. AI Inc

    AI Inc LawnSite Fanatic
    Posts: 25,230

    yes you can add an additional CV anywhere along the intake you so desire. Closer to the source the pump will struggle less.
     

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