In Between Distances

Discussion in 'Irrigation' started by ArTurf, Mar 6, 2007.

  1. ArTurf

    ArTurf LawnSite Platinum Member
    Male, from Ark
    Messages: 4,471

    How do you cover an area that is say 50 feet? I know there are nozzles that spray this far but their gpm is so high it is not practical and it would be nice not to run another head down the middle and spray just 25 ft. Any thoughts on this.
  2. Wet_Boots

    Wet_Boots LawnSite Fanatic
    Messages: 50,757

    50 x 50 feet? A 50-foot-deep front lawn?
  3. ArTurf

    ArTurf LawnSite Platinum Member
    Male, from Ark
    Messages: 4,471

    It is the back yard. It is 50x140.
  4. Wet_Boots

    Wet_Boots LawnSite Fanatic
    Messages: 50,757

    As much as manufacturers are feeding us all the head-to-head koolaid, you can have a happy lawn without every blade of grass getting water from at least three sprinkler heads. If you did head-to-head spacing down each long side, you'd pretty much have your bases covered, assuming good pressure and 35-40 foot spray distances. With lousy pressure, and 30 foot radii, then you'd probably have a middle row of heads.
  5. kevreiland

    kevreiland LawnSite Member
    Messages: 4

    What if... Could you just run one zone down the center and use five heads still using head to head coverage?

    Just a thought!
  6. Ground Master

    Ground Master LawnSite Senior Member
    Messages: 505

    I'd install 3 rows of 6 heads each
  7. justgeorge

    justgeorge LawnSite Senior Member
    Messages: 353

    I might go with 5 heads down the sides (35' spacing) and a row down the middle using Hunter I-20s with 25' nozzles. The number of heads down the middle row would depend on how much triple coverage you want.

  8. bicmudpuppy

    bicmudpuppy LawnSite Silver Member
    Messages: 2,781

    Why not design for 45' heads and near 50' spacing? The PGP w/ 40 psi and a #10 or the Irritrol CR500 w/ a #6 would do your 140x50 with 8 heads. If you want to match precip, drop your corners down to 38' nozzles PGP #7 or CR500#3. This isn't perfect head to head, but it meets specs for uniform coverage unless your in an area with strong prevailing winds. You haven't given us any specs for available water. My layout needs 36gpm with matched precip or 48gpm going uniform nozzles. With uniform nozzles, I would do 4 12gpm zones and run the corners for less time. If 12gpm is more realistic than 18gpm, then I would do 3 zones for a matched precip configuration. 40psi at the head is going to assume 60psi service pressure in most situations.
  9. Wet_Boots

    Wet_Boots LawnSite Fanatic
    Messages: 50,757

    In ancient days, you might see 50 x 140 done with 8 popup (brass) impact heads, and no apologies, or head-to-head needed.

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