Discussion in 'Irrigation' started by jabbo, Jun 25, 2012.

  1. jabbo

    jabbo LawnSite Member
    Messages: 215

    Well, we are still waiting on the city crew to install a 1" meter in the place of the 3/4". But I would like to go ahead and lay the heads out. I know that we did a faucet test and got around 13 gpm. So the gpm should be up around 16-17 gpm I'm hoping. The pressure is real good and should be even after we install the RPZ. So what do you think is a good spacing for the heads. I am leaning on the 5000 plus and if not them the pgp ultras??? I am going to say around 30'-34'...
  2. Kiril

    Kiril LawnSite Fanatic
    Messages: 18,334

    Hoping ain't gonna cut it. Be sure before you start doing anything.

    Messages: 18,668

    The spacing should be based on the site layout. I've never figured my spacing before I designed the layout. I know what my spacing parameters are based on an accurate pressure and flow analysis.
  4. Mike Leary

    Mike Leary LawnSite Fanatic
    Messages: 23,148

    Double ditto what they said. If you want to chuck "30-34' " you better be spot-on.
  5. jabbo

    jabbo LawnSite Member
    Messages: 215

    Yea I knew I was going to get these answers and with good reason so I guess I will have to wait...Thanks!
  6. Wet_Boots

    Wet_Boots LawnSite Fanatic
    Messages: 50,374

    I always liked to wire a house before the framing was done.
  7. ArTurf

    ArTurf LawnSite Platinum Member
    Male, from Ark
    Messages: 4,342

    What is your static psi, line size & etc. I would go with the 5000. The spacing is mainly determined by the site but yes you can space a rotor 30'-34' with decent pressure/volume. I do sit down and rough design a system on paper before giving an estimate.
  8. jabbo

    jabbo LawnSite Member
    Messages: 215

    Thats kinda what i was thinking...Once they get it installed it will be a 1" line from the curb, 1" meter, 1" backflow, and 1" mainline probably all the way throughout...I do not know the static pressure but I do know that it is a good bit higher than mine(lived there for about 25 yrs.:laugh:) and I'm on a deep well with 45/65 or close to that....We are going on vacation next week and I was planning on spending some time drawing it up and laying out the zones. But if we cannot check the gpm to know how many heads to put on a zone before we leave all I can do is draw in the heads. :hammerhead:

    P.S. Once they get the meter in, I am planning on installing a liquid filled guage and a brass ball valve and do a bucket test to know exactly how many gpm we got and the pressure....
  9. Wet_Boots

    Wet_Boots LawnSite Fanatic
    Messages: 50,374

    you'll need a big bucket
  10. greenmonster304

    greenmonster304 LawnSite Gold Member
    Messages: 3,648

    When builders try to rush me to install before the site is ready I like to say to them "you wouldn't paint the sheet rock before you hang it on the wall, so why do want to install sprinklers before the grade is set".
    Posted via Mobile Device

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