Pinholes in PGP stem!!

Discussion in 'Irrigation' started by jcom, Jun 23, 2005.

  1. jcom

    jcom LawnSite Senior Member
    Messages: 791

    We installed a system in May and the customer called saying there was a lot of water by four of his PGP rotors. Figuring it for a loose cap or nozzle, I was startled to find pin holes in all of the stems. One of them had two close to each other. What a mess they were making.

    Anybody have experience with this as I don't know how this can happen???

    John :dizzy: :dizzy:
  2. SprinklerGuy

    SprinklerGuy LawnSite Bronze Member
    Messages: 1,778

    There is one hole in the PGP riser that is supposed to be is a flush hole. when the PGP starts up, water is flushed out of this hole...but then it is SUPPOSED to stop. If it doesn't that seal is bad.

    Pinholes....could be sand causing that or other debris in the riser seal. Or if you have very sandy water etc. The only way to prevent this is to install I-20 w/ stainless risers.

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