Spring Startup Help

Discussion in 'Irrigation / Sprinkler Forum' started by Flyjetz, Apr 25, 2009.

  1. Flyjetz

    Flyjetz New Member

    Joined:
    Apr 25, 2009
    I'm trying to get my sprinkler system restarted this Spring and can't seem to get the water past the backflow preventer. Here's what I've done:

    1) I closed all the drains.
    2) I opened the water main about 1/8 of a turn.
    3) I opened both ball valves on the backflow preventer (parallel to the pipes).
    4) I made sure the brass threads were closed (perpendicular).
    5) PROBLEM: WATER IS SURGING OUT OF THE TOP OF THE BACKFLOW PREVENTER.
    6) I tried turning on each zone to see if I could get water to flow into the zones anyway. No luck.

    I'm a novice. Has anyone seen this problem, or have any idea what I'm doing wrong?

    Thanks!!
     
  2. Terry

    Terry Administrator Staff Member

    Joined:
    Aug 17, 2004
    Occupation:
    Plumber
    Location:
    Bothell, Washington
    You need to open up the valve more.
    It's takes water full on to push the seal closed on the vacuum breaker.
     
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  4. Flyjetz

    Flyjetz New Member

    Joined:
    Apr 25, 2009
    Problem solved!! Thanks!!
     
  5. PSLawnService

    PSLawnService New Member

    Joined:
    May 16, 2009
    Occupation:
    Lawn Service - Owner
    Location:
    Minnesota
    1. Close all valves and test cocks on the backflow
    2. Turn water source on (easy does it) all the way
    3. Program you controller for a short (4-5 Min.) watering cycle. Start it up.
    4. On the PVB (Backflow Preventor) determine the direction of the water flow
    5. Turn on the source side first-briskly to reset the backflow.
    6. Turn on the irrigation side last, slowly at first to fill the underground pipes.
    Zone 1 should already be open, allowing the underground pipes to not be
    air-locked.
     
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