Sprinkler Anti Siphon valve is leaking from cap

Discussion in 'Lawn Care/Landscaping' started by JoeyDYI80, May 29, 2020.

  1. JoeyDYI80

    JoeyDYI80 New Member

    Joined:
    Jan 24, 2020
    Location:
    San Diego
    Tonight after I manually turned on one of my sprinkler zones for few minutes and after it was done I noticed that water was continuously leaking from the underneath the cap of the anti siphon valve. I thought it would stop after a few minutes, but it did not. When I tried to turn on the sprinkler zone again the water would stop, but after closing it again it would leak again. So I just went ahead and shut off the valve for the whole sprinkler system until I was able to troubleshoot.

    So in my situation do I need to replace the whole anti siphon valve unit or can I just fix the cap part. I am attaching a pic with the part circled in red to indicate where the leak is coming from. Any help would be appreciated.

    Anti Siphon Value.jpg
     
  2. fitter30

    fitter30 Active Member

    Joined:
    Feb 2, 2020
    Occupation:
    Retired service tech
    Location:
    Peace valley missouri
    There should be a rebuild kit for it. Just google model and brand for the the parts.
     
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  4. wwhitney

    wwhitney Active Member

    Joined:
    Mar 17, 2019
    Location:
    Berkeley, CA
    The anti-siphon is downstream of the valve, so I believe either

    (a) the valve isn't fully closing and is letting some water past or
    (b) the zone has outlets at a higher elevation that your anti-siphon unit (which I believe it shouldn't) and you just haven't waited long enough for it to empty the zone.

    Cheers, Wayne
     
  5. WorthFlorida

    WorthFlorida The wife is still training me.

    Joined:
    Oct 28, 2009
    Occupation:
    Retired
    Location:
    Orlando, Florida
    A leaky valve would not cause the anti siphon to open. wwhitney (b) is more likely the cause.
     
  6. Reach4

    Reach4 Well-Known Member

    Joined:
    Sep 25, 2013
    Location:
    IL
    With a regular spigot with anti-siphon, you can clean debris out under the cap, and often need no new parts. Is it similar with a valve like Joey's?
     
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