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just a few ???s

Discussion in 'Irrigation' started by onemancrew, Mar 15, 2003.

  1. onemancrew

    onemancrew LawnSite Member
    from tn. #7
    Messages: 95

    :confused: :confused: :confused: I'm not wanting to get in the installation end of irrigation. I just want to put one in my front lawn. I'm in lawn care & we all know a nice lawn speaks for itself. The deal is is there anyway round paying rainbird for a design for my lawn? My lanw is square, 52x95 with about 20 deg. slpoe down from road to house. With a rotary head i can cover my lawn with only moving the head 2 times. Don't know my pressure , but it's pretty ggod. Any help wuld be appreciated. Just want to have proper coverage. Thanks
  2. HBFOXJr

    HBFOXJr LawnSite Bronze Member
    Messages: 1,712

    Get a residential design manual from Hunter, down loadable from the web or get a locar contractor that know his stuff to lay it out and install the pipe. You do the rest.
  3. navyman

    navyman LawnSite Member
    Messages: 13

    your area to be watered is a very simple one, remember this, typically a gear drive at 2.5 gpm will shoot 30' +- 5' so with an area of 52'x95' round up to 60x100 and install heads in a triangle fashion one in each corner and 1 between each corner on the 90'property line and 2 down the center, 30' in from from the 60' property line for a total of 8 heads 2 zones should be all you need and should be about 10-12 gpm each, take 2 corner heads 1 center head and 1 side head per zone this will give you 100% coverage at the most efficient method. Good luck, Navyman
  4. Ground Master

    Ground Master LawnSite Senior Member
    Messages: 505

    my design:

    a b b a
    c d d c
    a b b a

    it will take 12 heads to irrigate this area properly
  5. navyman

    navyman LawnSite Member
    Messages: 13

    I am very confident that this configuration will work 100%
    a a a
    a a
    a a a
  6. navyman

    navyman LawnSite Member
    Messages: 13

    I am sorry the last reply did not come out as intended will try to resend in correct fashion it should be as follows;

  7. Ground Master

    Ground Master LawnSite Senior Member
    Messages: 505

    navyman- on my 12 rotor design the heads are set for 27' to 33' depending on location.

    I can see your design working (sans middle heads) if you set the heads along the edges to 48 to 52' or so, but then you'll need a bigger rotor like the talon and at least 45psi at the head.
  8. HBFOXJr

    HBFOXJr LawnSite Bronze Member
    Messages: 1,712

    Assume head to head coverage down the long side, 30.66' on center, total 4 heads.

    Next row (middle) should be .86 times the distance between heads down the row (30.66 x .86)= 26.37'.

    This makes a triangle that is equal distance on all sides assuring uniform coverage.

    Problem Here - Lay this out on paper and use a compass to scribe a part or full circle representing appropriate coverage of a head, again assuming head to head coverage.

    Hatch or color in the amount of coverage on all areas. You will see that on each end of the middle row you will be a little lighter because there is no corresponding water coming back from a head that would be out of bounds.

    Triangular spacing works best in large open sites where boundaries are more imaginary than real, such as parks, double row golf course fairways and triple row approaches and some sports fields etc.

    In areas with boundaries that must be bordered by heads as the first part of the design, I prefer head to head or better coverage with a rectangular pattern of 26' x 30' in this case.

    One of Hunters design (head layout) bulletins says corners (internal or external) are the "critical areas" where a design starts. Then measurements are taken on the sides and an equi-distant spacing is established. Then full circles are placed through the rest of the area at a similar spacing to the border sprinklers.

    So designed by traingle the job requires 11 heads and by rectangular 12 heads.
  9. greenworldh20

    greenworldh20 LawnSite Senior Member
    Messages: 659


    the property is 52 x 95...this is a rectangle to me...there fore square spacing is the best method.

    with triangle spacing you will have to crank down the full circles so they do not throw water on neighbor's property.

    this seems like an easy one to me...

    i would have another irrigation contractor confirm design and install pipe like other said.

    makes life easier.

    get a licensed plumber to do tap out and install backflow prevention device...rpz is the best, but pvb should do. i do not know where you are located, but i would install inside and outside drains for winterization of system.

    if pressure allows, i would install hunter i-20's, hunter jar top valves malexbarb, hunter pro-c timer (not necessary for 3 zone system, but i just like'em) and mini clik wire less rain sensor.

    dura o-ring manifold t's will make installation and (i hope not!) repair quite easy. water proof wire connections with gravel base in valve box (looks nice and allows drainage).

    make a diagram of where pipe was installed. this would be good if you do any landscaping, fence installed, invisible dog fence...

    good luck
  10. 1idejim

    1idejim LawnSite Fanatic
    Messages: 11,318

    go to search forums, go advanced, type invisible fence, push send.

    type post, blend in, spread propaganda, take your chances you don't get caught, if caught play the innocent educator do gooder, play the blame game,do a spin and by all means don't quit.

    this was not a honest approach by any means

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