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before sod - how high on heads

Discussion in 'Irrigation' started by zliminator, Mar 25, 2007.

  1. zliminator

    zliminator LawnSite Member
    Posts: 82

    I have a customer who wants the sod installed after the irrigation system. How high should I leave the heads sticking out of the ground? I figured the sod will add about 2" the the ground level.

    Dan
     
  2. bicmudpuppy

    bicmudpuppy LawnSite Silver Member
    Posts: 2,781

    Your figuring the sod to add 2" to grade? Who is laying this sod? and what do the crews look like? If I'm the guy laying it or paying the guys to lay it, I'm going to throw a tissy fit if they sod is cut more than an inch and I would prefer 3/4". I have seen sod cut at 1/2" and it doesn't hold up well. 3/4" with reinforced netting holds up and lays well. Normally, I grade to the base of a PGP. The sod makes up the rest of the difference. A bit more than the cap showing on spray heads. So, grade for just over 1/2" and live with it if the sod comes in thick.
     
  3. Dirty Water

    Dirty Water LawnSite Fanatic
    Posts: 6,799

    I set heads at 1.25" higher than grade. What works well for reference is a scrap of 2x4. Sod varies greatly from region to region, and I've found that the amount of soil with the sod strips works out to exactly that here.
     
  4. Duekster

    Duekster LawnSite Fanatic
    from DFW, TX
    Posts: 7,961

    Flex connections also help here.
     
  5. Dirty Water

    Dirty Water LawnSite Fanatic
    Posts: 6,799

    I think any installer worth his money should be putting heads on swing joints.
     
  6. Duekster

    Duekster LawnSite Fanatic
    from DFW, TX
    Posts: 7,961

    I don't always use swing joints because I don't get paid what I am worth but I do use flex on every job.
     
  7. Dirty Water

    Dirty Water LawnSite Fanatic
    Posts: 6,799

    Enlighten me, as different regions use different terms.

    What is this flex you speak of? Poly Pipe? Doubtful down in TX.

    Poly Cutoff risers maybe?
     
  8. Duekster

    Duekster LawnSite Fanatic
    from DFW, TX
    Posts: 7,961

    I think they call it funny pipe.

    I use a thread barb on other ends. It has to be about a foot long or else it does not stay put with out a swing fitting.
     
  9. txgrassguy

    txgrassguy LawnSite Gold Member
    Posts: 3,084

    The chances are the original poster is laying either St Augustine or Centipede grass. And there no freaking way a sod harvester is going to cut either of these two grasses at anything below 2".
    Some of the hybrid Bermuda's and Zoysia's are cut much thinner do to their growth characteristics and I have never heard of St Augustine or Centipede being available with the reinforcing net.
    It's been awhile since I threw sod in Florida so maybe things have changed.
    Regarding the irrigation head height, with the heads on swing joints your life would be much easier.
    As an economizing tactic you can opt for poly pipe but after a certain amount of heads on the install you will actually save money
    buying ready made swing joints.
     
  10. Dirty Water

    Dirty Water LawnSite Fanatic
    Posts: 6,799

    I make all my swing joints out of funny pipe, two barb el's and a marlex 90.
     

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