z spray leaking from the pressure regulator adjuster knob

Discussion in 'Pesticide & Herbicide Application' started by ant, Apr 28, 2012.

  1. ant

    ant LawnSite Silver Member
    Posts: 2,442

    when i back off the adjuster knob to by pass it leaks bad..


  2. ant

    ant LawnSite Silver Member
    Posts: 2,442

    see second pic.. it leaks out of that little hole
  3. Cadzilla

    Cadzilla LawnSite Senior Member
    Posts: 899

    Probably an O-ring failure or some such thing.
  4. RigglePLC

    RigglePLC LawnSite Fanatic
    Posts: 12,233

    What chemicals did you use last year? Esters are a bit tough on rubber. O-ring could have become swollen and twisted sideways when you move the adjustment knob in and out.
  5. greendoctor

    greendoctor LawnSite Fanatic
    Posts: 9,064

    Pendulum 3.3 is also rough on seals as well. I recognize that pressure regulator as a Teejet 23120. If you have the standard o rings instead of the Viton ones, those will get eaten up by the more active lawn chemicals.
  6. ant

    ant LawnSite Silver Member
    Posts: 2,442

    prodiamine wdg

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