Programmed versus manual activation

Discussion in 'Irrigation / Sprinkler Forum' started by baronoff, Jul 19, 2008.

  1. baronoff

    baronoff New Member

    Jul 19, 2008
    One station in our sprinkler system is having a problem I've never encountered before. It works perfectly when manually opened at the local vault box, but when activated by the automatically timed control box there is significantly less pressure, such that the pop ups do not rise up much. Any suggestions will be much appreciated.
  2. Wet_Boots

    Wet_Boots Sprinkler Guy

    Mar 23, 2007
    Metro NYC
    Make and model of valve? (or a photo)
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  4. hj

    hj Moderator & Master Plumber Staff Member

    Aug 31, 2004
    Cave Creek, Arizona

    The manual and automatic methods operate differently. If the automatic method does not "dump" water fast enough, or if it is damaged internally so the water is being replenished as it is dumped, then it will not open entirely. Manual operation usually can overcome any bypassing internal leakage and open all the way. You may have a bad diaphragm, weak solenoid, restricted solenoid water passages, etc.
  5. Joerg

    Joerg New Member

    Oct 6, 2004
    Or the solenoid plunger can't fully retract anymore because rust or crud has accumulated in the shaft. I'd take it off and look.

    Regards, Joerg.
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