Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 5 of 5

Thread: inground sprinkler system- mowed a sprinkler head

  1. Back To Top    #1

    inground sprinkler system- mowed a sprinkler head

    we've got one 9 inch sprinkler head in the front yard that gets eaten by the mower at least once a year. Yesterday I cut the grass on a higher level and thought I'd have "clearance", but no- mowed the top off. Going to Lowes later for ANOTHER replacement- hoping to find maybe a 7 or 8 inch one that'll be more recessed.
    14'x28' vinyl liner inground 3.5-6' deep wedge hopper 15000 gal (used to say 13000- I calculated wrong), 1 hp pump with sand filter, 2 returns, 1 fountain, traditional chlorinated, pool house.

  2. Back To Top    #2

    Re: inground sprinkler system- mowed a sprinkler head

    Sometimes (here in Texas where it never freezes the ground) the heads are actually set on "funny pipe" which is a short bit of flexible pipe that is then attached to the PVC pipe. If you dig up the entire head, you might find it attached to this softer black pipe, not white or grey hard PVC. If so, you can dig a bit deeper and reset the entire head a bit lower, or even a bit left or right if that will help protect it from the mower. The sprinkler heads I've seen are either the old fashioned 4" rotary heads that throw a long way, like 20'-30' or the smaller spray heads. In both cases there are concrete rings that can be bought from irrigation supply stores that will allow you to protect the heads from mowers.

    That said, I have still managed to cut the head off of one and I insist that it was an accident, not anything deliberate done just to underscore that I'd requested that this head be lowered and my husband insisted that it was not necessary.

    With the St Augustine grass that we have, if you don't weedwack around each head every week, after about 3 or 4 weeks the head can be totally lost. Once it is covered over, the head will try to pop up but it can't and so the O-ring gets cut out. Eventually the whole thing fails and water gushes or oozes there while the rest of the zone suffers low pressure. Dry grass is easy to spot but dry shrubs may die before you notice them. If you have the collar on it, you can eventually find it by hunting with a long screwdriver in the general vicinity where the head ought to be based on regular spacing. But hitting the head or the collar is still a hassle.
    23,000 gallon in ground pool with rock waterfall and spillover spa, Aqualink control system, Polaris 380 cleaner, Purex Triton Clean&Clear Plus cartridge filter. Located in The Woodlands, Texas.

    Pool owner since Nov 2008, Trouble Free since April 2009. Happy to help when I can.

  3. Back To Top    #3

    Join Date
    Dec 2009
    Location
    Central Massachusetts
    Posts
    2,690

    Re: inground sprinkler system- mowed a sprinkler head

    Quote Originally Posted by anonapersona

    Sometimes (here in Texas where it never freezes the ground) the heads are actually set on "funny pipe" which is a short bit of flexible pipe that is then attached to the PVC pipe..
    FWIW, Most irrigation up here in new england is plumbed entirely with funny pipe. PVC for irrigation is a waste of money

    Yea, dig the head out set it lower, flush with the ground.
    14,000 gallon IG, Vinyl. Hayward 3/4 hp superpump, Penatair IC40 SWCG, Pentair automation, Hayward sand filter, Aqua Comfort heat pump, Hayward 400k Lo-Nox LP heater.

  4. Back To Top    #4

    Re: inground sprinkler system- mowed a sprinkler head

    The new system put in at my daughter's house was all funny pipe but they seem to have disregarded the massive pressure loss going from the front yard to the back yard from using only small pipes. I was amazed to see them bring 6 1" lines all the way around the house, then of course each zone had to be rather small due to lost pressure. Older systems used a large main line that reached most of the distance required to preserve that pressure. I guess the cost trade off was the wire needed to connect the valves to the controller. Still, the larger 2" PVC has to be cheaper than 6 1" lines of the same length. I didn't challenge the installer, but I have to wonder if he really had a license. Due to the long runs, the lost pressure means that they don't get proper coverage, the heads don't preform as expected due to low pressure.
    23,000 gallon in ground pool with rock waterfall and spillover spa, Aqualink control system, Polaris 380 cleaner, Purex Triton Clean&Clear Plus cartridge filter. Located in The Woodlands, Texas.

    Pool owner since Nov 2008, Trouble Free since April 2009. Happy to help when I can.

  5. Back To Top    #5

    Join Date
    Dec 2009
    Location
    Central Massachusetts
    Posts
    2,690

    Re: inground sprinkler system- mowed a sprinkler head

    Some guys dont know how to install it. Usually, you run 2-3 larger lines that are feeder lines that stay pressurized all the time to the valves. From there,smaller pipe feeds the zones. For rotary heads, no more than 4 heads per zone. For pop up spray heads, you can do 5-6.

    Where are you that you need a license for irrigation install? Here a plumber has to tie into the water line and install the backflow preventer, after that anybody can run the irrigation.
    14,000 gallon IG, Vinyl. Hayward 3/4 hp superpump, Penatair IC40 SWCG, Pentair automation, Hayward sand filter, Aqua Comfort heat pump, Hayward 400k Lo-Nox LP heater.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •