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Backyard system connected to outside faucet

Discussion in 'Irrigation' started by hect911, Mar 29, 2006.

  1. hect911

    hect911 LawnSite Member
    Posts: 49

    I am installing a sprinkler system in a house and the customer wants his backyard done too. The problem is that his house is surrounded by concrete and I cannot get the main line to the backyard without breaking the concrete. So I suggested that we can hook up the backyard system to an exterior water faucet.

    Any ideas on how I can determine the available GPM etc. etc. etc. to make sure everything works out?

    Thanks in advance
  2. Grassmechanic

    Grassmechanic LawnSite Silver Member
    Posts: 2,697

    Run a whole seperate supply to the backyard. Kinda like having two sprinkler systems. I wouldn't use a hose bibb. They are usually only 1/2". Besides, it would look awful tacky and unprofessional, not to mention backflow prevention issues.
  3. Green Sweep

    Green Sweep LawnSite Senior Member
    Male, from Pittsburgh, PA
    Posts: 322

    We had the same situation. We T'd the mainline in the basement & sent one out in front & one out in back. Also installed 2 master valves. 99% of our P.O.C.'s here are in basements. I don't think that you have that luxury in Texas. I do agree that threading on to an outdoor hose bib is unprofessional & the flow restriction will create very small zones.

  4. Wet_Boots

    Wet_Boots LawnSite Fanatic
    Posts: 47,642

    The Toro Flow & Pressure gauge assembly could easily read the hose bib capacity. It is difficult to make such a connection look professional. Doing it entirely in brass and copper can help it look good and be durable, too. Of course, you need to have proper backflow protection.

    Sometimes, there is no practical means to have a basement P.O.C., when dealing with a finished basement. It becomes a comparison between the possible cost of extra zones, to make up for the hose bib supply, compared for the time and material involved it ripping out and replacing part of the finished basement. <b>IF</b> sufficient water can be had from that hose bib, then it can be used for the lawn sprinklers, without misgivings.
  5. Dirty Water

    Dirty Water LawnSite Fanatic
    Posts: 6,799

    We do it on occasion if there is no way to tap the meter (incased in concrete etc).

    We use a Lee valley Hose Y valve so the homeowner can still use his hose bib, and then use a brass 45 and a hose thread to pipe thread adapter to get it oriented parrelell to the house.

    Run a SCH 80 nipple below grade and install backflow and your set.

    This is the lee valley Hose Y we use (Not our install, this is a pic I found on the web).

  6. NC_Irrigator

    NC_Irrigator LawnSite Bronze Member
    from NC
    Posts: 1,415

    thats a nice rig!
  7. hect911

    hect911 LawnSite Member
    Posts: 49

    I've been wanting to order the Toro Flow and Pressure gauge, seems pretty helpful. Is there a flow gauge that will measure more than 13 GPM or is the Toro the only out there?

    I am also thinking of installing the Rain Bird anti-siphon valves in the backyard since its only a very small area. I'll be using a Double Check Assembly in the front yard.
  8. NC_Irrigator

    NC_Irrigator LawnSite Bronze Member
    from NC
    Posts: 1,415

    that toro flo thing really isnt worth the time, i had one and it fell off the truck and broke. its good for measuing psi, but you have to figure your psi loss through the house piping system... & your gpm is of that spicket, not what your meter and potentially provide
  9. Wet_Boots

    Wet_Boots LawnSite Fanatic
    Posts: 47,642

    I would still say brass and copper look best, and for above-ground backflow preventers, provide needed support. In freezing climates, I hate to see ball valves outdoors unless they're absolutely necessary. As far as the Toro Flow and Pressure Gauge goes, it will measure what a hose bib delivers, at varying flows and pressures, as you adjust its gate valve, which gives you the information you need about what the hose bib can supply to a sprinkler system.

  10. iluvscag

    iluvscag LawnSite Senior Member
    Posts: 741

    By the way welcome to Seansite.com I mean Lawnsite

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