rairbird/ hunter sprinkler heads not going down...

Discussion in 'Irrigation' started by cuttin-to-the-Max, Jun 30, 2011.

  1. cuttin-to-the-Max

    cuttin-to-the-Max LawnSite Bronze Member
    Posts: 1,333

    Ok well the other day i ran over a sprinkler head.....this hasnt happened in over 15years!!!! After hitting the head we stopped and looked for more heads that were up. Stepped/ popped down over 7 heads.

    We ran the system and soe of the the sprinklers go down manually instead of auto.
    I guess she just had the sprinkler guys out!
    So i dont have to fix it. But im just curious why this is.... I pulled some of the grass back and they still dont go down..... Why is this??
     
  2. mitchgo

    mitchgo LawnSite Silver Member
    Posts: 2,789

    A lot of times it's grit in the stems that's preventing them from going down. This happens often if the head is installed too low.

    Other times it's Aged heads and are in need of replacement.
    A cheapo person could take it apart, clean it, lube it up, stretch the spring some and probably would make it last a few extra years.
     
  3. WalkGood

    WalkGood LawnSite Bronze Member
    Posts: 1,910

    If the heads don't go down, even when you step on them, there's probably rocks in the bottom.
     
  4. mitchgo

    mitchgo LawnSite Silver Member
    Posts: 2,789

    or those damn riser stem extensions
     
  5. Mike Leary

    Mike Leary LawnSite Fanatic
    Posts: 22,071

    Low-drain checks take their time if it's a big zone.
     
  6. TRUE...grit
     
  7. Buck_wheat

    Buck_wheat LawnSite Senior Member
    Posts: 585

    Leave them for the landscaper to take care of :laugh:
     
  8. cuttin-to-the-Max

    cuttin-to-the-Max LawnSite Bronze Member
    Posts: 1,333

    Ok also i have another question!
    How do you find a hidden/ grass covered valve control box??? I found 5/7 valves....
     
  9. Sprinkus

    Sprinkus LawnSite Silver Member
    Posts: 2,119

    Typically I would use some type of electronic valve locator.
    You can also turn the valve on and off at the controller and have someone listen for the clicking of the valve solenoid (Make sure the water is off if you do this).

    In addition you can poke around with a shovel/screwdriver in the area you think the valve is located. Sometimes there is a depression in the ground due to the soil settling where the excavation for the valve was done.
    Also there may be a difference in the appearance of the grass over the valve box.

    I've also seen some people successfully use a metal detector to find buried valves.
     
  10. bx24

    bx24 LawnSite Senior Member
    from MA/TX
    Posts: 503

    I had that on some heads in sandy soil...Thus far silicone works nice! :)
     

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