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head not getting water to it. wtf

Discussion in 'Irrigation' started by tbettis, Mar 9, 2009.

  1. tbettis

    tbettis LawnSite Member
    Messages: 223

    i have a head thats not getting water to it in one particular zone. where do i start before i start digging(which i do not want to do). as to note the other 3 heads in this zone are spraying really strong. i take the head off and theres no water at all and im like wtf. head was properly working last summer and fall.
  2. DanaMac

    DanaMac LawnSite Fanatic
    Messages: 13,187

    If there is a tree close enough by, roots could have grown and choked the pipe.
    Could be clogged somewhere between the two heads.
    Make sure that head is not on another zone. I've had that happen to me.
    Construction or utility lines installed over the winter. Maybe contractors cut the pipe and plugged it off.
    Frozen pipe, but it looks like you are in the south.
  3. mitchgo

    mitchgo LawnSite Silver Member
    Messages: 2,922

    I agree.. I get customers all the time stating this when it's actually just on a different zone.

    Unfortunately you have to dig it up if that is not the case. Depending on the install of the head there are several 'elbow' joints. ( A 90 degree fitting) .. A Rock can lodge into that fitting completely blocking water flow.

    So do a systematic diagnosis. Dig up the head. Unscrew it and check for any kind of debris. IF it's still clogged look at the first elbow. You have to keep working your self back untill you find the clog point.

    I get Soooo frustrated when the funny pipe is like 10' away from the pvc!
  4. AI Inc

    AI Inc LawnSite Fanatic
    Messages: 26,622

    If you used funny pipe and sbe fittings , there is a rock in the sbe elbow. Not the one on the bottom of the head , the other one at the end of the big pipe.
  5. tbettis

    tbettis LawnSite Member
    Messages: 223

    i used funny pipe and sbe fittings on this install but how in the world could a rock get lunged in between the fittings all of the sudden? please explain the possibilities
  6. DanaMac

    DanaMac LawnSite Fanatic
    Messages: 13,187

    I've seen this happen. The rock was in there at the time of the install, BUT it was turned somewhat at the point it is lodged now, allowing enough water through at that time. It has probably now turned and is blocking the flow.
  7. mitchgo

    mitchgo LawnSite Silver Member
    Messages: 2,922

    Though the probability is higher that's not quite true. All depends on the size and angle of the rock or debris.. It could have flown right by the first elbow due to the angle but got lodged at the next one.
    I'd feel like a idiot... Digging back two feet to the Sprinkler tee , cutting the funny pipe and taking out the swing elbow.. when there isn't anything there.
    We all have our own ways.. I just like to be systematic.. I try not to assume much. I'd be making an ASS out of yUo and ME.
    Sometimes It can take a while for a rock to move through the pipes..
    That's why flushing before the final connection is so important.
  8. tbettis

    tbettis LawnSite Member
    Messages: 223

    well its not a new install. its been in the ground for about 6months
  9. Mike Leary

    Mike Leary LawnSite Fanatic
    Messages: 23,100

    I've had pebbles show up months after the completion of a system, in spite of me hammering the crew to tape the ends of the the pipes and shop-build the manifolds; they just creep in. :dizzy:

    Messages: 18,668

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