Sprinkler zone wouldn't stop

Discussion in 'Lawn Care/Landscaping' started by maddog, Mar 3, 2008.

  1. maddog

    maddog Engineer

    Messages:
    129
    Location:
    near San Jose, CA.
    Have a timer with 5 zones active. One of the zones would not stop this morning. Tried to stop sprinklers manually by turning off the timer, but water would not shut off. Had to turn off water to irrigation system to stop the sprinkler. Is this most likely a problem with the anti-siphon valve getting stuck open? Or a problem with the timer? Sorry for the lack of details. Thanks much for your help.

    Attached Files:

    Last edited: Mar 3, 2008
  2. maddog

    maddog Engineer

    Messages:
    129
    Location:
    near San Jose, CA.
    I'm thinking it's the anti-siphon valve. Came home and unplugged timer - turned on water and the sprinklers came on again. The solenoid looks a bit corroded and probably has dirt or something inside. Will replace and see what happens.
  3. Wet_Boots

    Wet_Boots Sprinkler Guy

    Messages:
    798
    Location:
    Metro NYC
    Unplug a timer to be certain it isn't the problem.
  4. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    26,686
    Location:
    Cave Creek, Arizona
    valve

    IT is inside the valve. Something is torn, broken, or stuck inside the valve.
  5. Rancher

    Rancher Guest

    The valve operates by that solenoid opening a bypass orifice, which causes the main valve to spring open. If you get a grain of sand in the solenoid-orifice seat, the valve will not turn off.

    Solution, unscrew the solenoid, clean it out.

    Rancher
  6. maddog

    maddog Engineer

    Messages:
    129
    Location:
    near San Jose, CA.
    Great - thanks much ... will give it a try.
  7. maddog

    maddog Engineer

    Messages:
    129
    Location:
    near San Jose, CA.
    Unfortunately, removing/cleaning the solenoid didn't do it. A replacement solenoid at HD was almost as much as a new valve, so I replaced the valve - and I'm back in business. Thanks much for the input. -dog
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