3 or 4 heads in 75'?

Discussion in 'Irrigation' started by jcom, Mar 8, 2008.

  1. jcom

    jcom LawnSite Senior Member
    Posts: 791

    We usually use 4 heads in a 75' span. 25' head to head.

    Just curious as to how many irrigators would stretch out to 37.5 feet and use three.

    1" POC. 1" main and laterals. 65psi. Normal sized city lot of 75' width.

    Ready to rock and roll but Ma nature still is cold.

    John:waving:
     
  2. justgeorge

    justgeorge LawnSite Senior Member
    Posts: 352

    I would use 4 but space them so that the middle two are about 33' from the edge instead of 25. I hate cutting down the spray to 25'.

    We have that spacing around here a lot, 100' lot width, take out the driveway and a strip beside the driveway leaves 75 - 80 feet many times.
     
  3. Mike Leary

    Mike Leary LawnSite Fanatic
    Posts: 22,064

    You got 65 @ the head....fine, otherwise design for center heads,
    throwing that far corner to corner is dicey. With the centers, you have
    (on a separate zone), much more control, especially if windage enters into it.
     
  4. Wet_Boots

    Wet_Boots LawnSite Fanatic
    Posts: 47,997

    37 is a bit much for a standard rotor, unless the half circles have big nozzles and high pressure.
     
  5. Mike Leary

    Mike Leary LawnSite Fanatic
    Posts: 22,064

    We agree...:drinkup:
     
  6. jcom

    jcom LawnSite Senior Member
    Posts: 791

    We do have 65 psi at the heads in many of our installs.

    75-80 at the POC. We have went to 33' before on a couple installs with big nozzles and it has worked alright because of the way we were able to zone the rest but we have been cautious to go beyond this distance. We just want to make sure that if we err, it is on the side of excess capacity.

    Thanks for all the opinions. They are very much appreciated.

    John:usflag:
     
  7. Mike Leary

    Mike Leary LawnSite Fanatic
    Posts: 22,064

    If more guys like you thought that way...the trade would have a better rep!:clapping:
     

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