Short circuit of automatic sprinkler

Discussion in 'Irrigation / Sprinkler Forum' started by bilirubin42, Apr 4, 2008.

  1. bilirubin42

    bilirubin42 New Member

    Apr 4, 2008
    I have an automatic sprinkler system, and for some reason when the timer finishes, the sprinkler keeps running. It seems like a short of some kind because all I have to do to shut it off is touch the control valve for that zone with a screwdriver. What can I do about this because I cannot water the lawn when I am on vacation and having a hard time recruiting people to make sure that same thing doesn't happen. (it ran for 10 hours once when I scheduled it after I had gone to work)

    Thanks for your help
  2. Wet_Boots

    Wet_Boots Sprinkler Guy

    Mar 23, 2007
    Metro NYC
    Throttle down the flow control, if the valve has one. Otherwise, replace the valve, or swap out all the parts with a new valve.
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  4. jimbo

    jimbo Plumber

    Aug 31, 2004
    San Diego, CA
    Unlikely that it is a "short circuit". It is either the solenoid on the valve sticking open, or the diaphragm on the valve sticking open. Get a new solenoid, and a valve overhaul kit.
  5. maddog

    maddog Engineer

    Aug 1, 2006
    Software Engineer
    near San Jose, CA.
    Same thing happened to me recently. Like Jimbo said - a new solenoid fixed it. Turn off the water and the power to the timer, disconnect the wires, and unscrew the solenoid to remove. A new one cost about $6 at HD.
    Last edited: Apr 5, 2008
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