Help diagnosing a problem..

Discussion in 'Irrigation' started by LouisianaZJ, Sep 4, 2003.

  1. LouisianaZJ

    LouisianaZJ LawnSite Member
    Messages: 34

    (I am a newbie to sprinkler system repair, I would appreciate your advice). I have an in ground sprinkler system at my residence. They said it was commercial quality when it was installed (about 20 yrs ago). Well, I have noticed that now one of the sprinkelers (a small pop up one) in zone 1 of the system stays on even when the timer is up in that zone (only two sprinklers in that zone, the other one leaks very slowly). it stays on until I shut off the water to the entire system. All the other zones work perfectly.
    So what type of problem am I looking at, a bad head, problems with the timer, or problems with the valve that is controlled by the timer. (I am leaning towards the valve)
    I can get pics if that helps.
  2. LouisianaZJ

    LouisianaZJ LawnSite Member
    Messages: 34

  3. JeffY

    JeffY LawnSite Senior Member
    Messages: 324

    It sounds to me like a diaphram in the valve needs replacing. It's relatively easy and quick to repair. What kind of valve is it?
  4. Ground Master

    Ground Master LawnSite Senior Member
    Messages: 505

    Yep, sounds like the valve will not close all the way. There is probably some type of debris blocking the valve from closing all the way. In many cases a small pebble will get stuck on the diaphragm preventing a solid seal once the valve turns off. Just take the valve apart and see whats in there.
  5. greenworldh20

    greenworldh20 LawnSite Senior Member
    Messages: 659

    they are right, lousianna. clean out the valve, possible replace the guts.

    that will be $64.78, sir.

    check, cash or credit card.

  6. LouisianaZJ

    LouisianaZJ LawnSite Member
    Messages: 34

    I paypal, haha
  7. HBFOXJr

    HBFOXJr LawnSite Bronze Member
    Messages: 1,712

    The 20 year old valve probably needs a rebuild without debris being a factor.
  8. DanaMac

    DanaMac LawnSite Fanatic
    Messages: 13,226

    Most likely the diaphragm or debris. But could also be a hairline crack in the valve, or solenoid problem.

    20 years? Replace it.
  9. alwayswet

    alwayswet LawnSite Member
    Messages: 4

    diaphram is what I would guess also even a small rip or dirt can do it. If you can't replace the valve you can replace the diaphram and that is very cheap and easy.... Dennis

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