Rain Bird 42sa nozzles

Discussion in 'Irrigation' started by 1999frontier, May 1, 2012.

  1. 1999frontier

    1999frontier LawnSite Senior Member
    from NC
    Posts: 562

    I've got the pre-installed 3.0 in my rotors right now but I was wondering if I put in the 8.0 would this cut down on how long it takes to water since it puts out more water and you can break up the stream more? Also, where can you buy the nozzle "trees"?
     
  2. hoskm01

    hoskm01 LawnSite Fanatic
    Posts: 5,690


    An 8 puts out more water than a 3, yes, but have you considered nozzling according to the arc of the head? You can't just put a three in all heads and expect even coverage unless all heads cover the same arc (180, 360 etc...).

    Go to your supply house and get a real head- RB 5000+ or Hunter PGP or I20. Nozzle trees are free with real heads.

    Lastly, don't "break" the stream unless absolutely necessary to keep water off of something. The nozzles are designed to run uninhibited.
     
  3. Mike Leary

    Mike Leary LawnSite Fanatic
    Posts: 21,603

    You are treading on thin ice, here, pal.:dizzy:
     
  4. Wet_Boots

    Wet_Boots LawnSite Fanatic
    Posts: 46,449

  5. 1idejim

    1idejim LawnSite Fanatic
    Posts: 8,844

    that's so stupid and i laugh each time even though i know it's coming :laugh:
     
  6. 1999frontier

    1999frontier LawnSite Senior Member
    from NC
    Posts: 562

    I know I probably should've posted in this section, but I was hoping to get an answer from the irrigation guys. I don't know how many of you go to the other sections on this site. Sorry
    Posted via Mobile Device
     
  7. Wet_Boots

    Wet_Boots LawnSite Fanatic
    Posts: 46,449

    You knew this job was dangerous when you took it....

     
  8. DanaMac

    DanaMac LawnSite Fanatic
    Posts: 13,156

    We are essentially saying, no, don't do this for many reasons. If you change out all the nozzles to an 8GPM nozzle, you are probably going to exceed the available GPM for your water supply. Let's say you have 4 heads on a line, all putting out 3GPM, that's 12GPM per zone. if you changed them all to 8GPM, that would be 32GPM per zone. Depending on the size of your water supply line, you probably have 12-20 GPM availability. Not many homes have 32. So your heads won't work properly or cover at all.

    As hoskm said, you need the right nozzles in the different heads. As an example, quarters might need 1GPM, halfs need 2GPM three quarters need 3GPM and full circle need 4GPM. All for even distribution.

    Also, by bumping to such a high output, your soil might not even be able to absorb the water as fast as you are putting it out, so you may get run off or pooling of water.
     
  9. 1999frontier

    1999frontier LawnSite Senior Member
    from NC
    Posts: 562

    Thank you for your response. That makes sense, I've only got two rotors that are going 180 degrees each. I've got them coming through a spigot timer and thats why I was wondering it would be efficient to put a larger nozzle on there. They run at seperate times. I got one that starts at 4am and the other one starts at 6:01am both running for 2 hours each. I watered this morning and I didn't have any run off , just the street was wet on the edge of the curb.
     
  10. hoskm01

    hoskm01 LawnSite Fanatic
    Posts: 5,690



    Definitely do not up your nozzles. 2 hours on rotors, how many times per week?

    You're putting down a lot of water at two hours, though a hose spigot is likely not capable of additional output; you're likely struggling as it is (with water)
     

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