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Thread: Sprinkler zone turns on automatically

  1. #1
    DIY Junior Member
    Join Date
    Apr 2010
    Location
    Colorado
    Posts
    1

    Default Sprinkler zone turns on automatically

    Hello all. I just turned on my water today to my sprinkler system to be met with an odd surprise. As soon as I turn the valve from the back flow assembly to the sprinkler line, one of my zones fires up and I have no way of controlling it other than to turn the valve back off. I can flip my sensor switch on the wall unit to bypass and test the other zones, but I can't get this one zone to shut off. Any ideas? Thanks.

    Nate

  2. #2
    Irrigation Contractor Fireguy97's Avatar
    Join Date
    Mar 2010
    Location
    Kamloops, in Beautiful British Columbia
    Posts
    100

    Default

    You could have either a bad solinoid, a stuck solinoid, or whoever winterized your system open the valves manually (by turning the solinoid) and left that one open.

    Mick

  3. #3
    Moderator & Master Plumber hj's Avatar
    Join Date
    Aug 2004
    Location
    Cave Creek, Arizona
    Posts
    25,651

    Default

    Most valves WILL operate when the water is first turned on because they have lost their pressurization, but they turn off as soon as the valve chamber fills with water. You either have a damaged diaphragm, bad solenoid valve, or the manual control is turned on.

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