Zone will not shut off.

Discussion in 'Irrigation' started by tbettis, Mar 7, 2009.

  1. tbettis

    tbettis LawnSite Member
    Posts: 221

    zone just keeps running past ending time. where do i start. ive checked wiring in valve box seems ok. is the valve getting stuck. is it a transmission problem from controller. its a rainbird system. any inputs.
  2. AI Inc

    AI Inc LawnSite Fanatic
    Posts: 25,393

    Probably debris in valve. Shut off water at backflow , wait a few minutes and turn it back on . This may flush it, if it dosnt you need to take it apart and clean it out. We usualy rebuild them while they are apart.
  3. milsaps118

    milsaps118 LawnSite Senior Member
    Posts: 559

    So you mean the zone that stays running...., once the time ends it stays on? Does it stay running when the next zone in sequence runs, or even if you turn off the clock? If this is the case I'd suspect that there is something causing the valve for that zone to stay open.

    I have had this happen to my personal system, when I twisted off the top of the valve I found a tiny pebble sitting in there. Removed it and problem solved.

    Hope this helps.
  4. DanaMac

    DanaMac LawnSite Fanatic
    Posts: 13,156

    Could be debris such as dirt, rocks, or PVC shavings hanging up the diaphragm. Or the diaphragm is just worn out or torn and in need of replacement. Possibly the solenoid is turned to "ON" which would mean it just needs a slight turn clockwise until snug.
  5. tbettis

    tbettis LawnSite Member
    Posts: 221

    valve is halfway fill to the rim with mud. will attempt to clear out tomorrow.
  6. tbettis

    tbettis LawnSite Member
    Posts: 221

    it stays running even the next sequence..if even stays running after i unplug the controller.
  7. mitchgo

    mitchgo LawnSite Silver Member
    Posts: 2,780

    Yep. You have a stuck valve.

    Clean out the valve box. Take apart the valve. Grab the piece of debris with some needle nose pliers. Make sure you flush the valve by turning on your shut off and back off for a couple seconds while the valve is taken apart. put it back together.

    If that doesn't work then the diaphram is damaged and needs to be replaced
  8. hoskm01

    hoskm01 LawnSite Fanatic
    Posts: 5,690

    Regardless of whats in the valve box, that shouldn't affect the inside of the valve. No good for anything in there, especially the solenoid and any electrical connections.

    Sounds like something stuck in it, as everyone else has stated. Might replace the solenoid anyway, while youre there. Cheap fix, could have been damaged by the debris.
  9. mitchgo

    mitchgo LawnSite Silver Member
    Posts: 2,780

    Can't really take apart the valve if it's full of dirt ;)

    And for the flush. you need some room otherwise the water will fill up the box and possibly get more debris inside the valve.
  10. hoskm01

    hoskm01 LawnSite Fanatic
    Posts: 5,690

    He should clean it out, no doubt, an absolute must if youre going to take apart the valve. As far as the valve is concerned though, it might as well be at the bottom of a muddy swimming pool. Im saying that the status of the box would have nothing to do with something getting inside the valve

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