Connecting Manifold to Water Supply - Need a Little Help

Discussion in 'Irrigation' started by the water boy, Apr 22, 2008.

  1. the water boy

    the water boy LawnSite Member
    Posts: 3

    I'm a homeowner putting in my own sprinkler system this summer. I'm not sure how to get from the copper of water supply to the Dura Manifold parts.

    I've had a plumber come in and hook into my water supply. He Tee'd in a 3/4" copper line, put a ball valve on for a shutoff, went through the wall, put in a hose bib, then down to a PVB, then there is copper coming out the bottom of the PVB that is capped off. I can't quite figure out how to make the transition from this point to the Dura manifold parts. I'm going to use a 4 port manifold and I'm okay with hooking the valves on. I've got male by barb valves and figure they screw on to the swivels and I'll cap off the male end. So getting from the copper to the swivel on what I think is meant to be the inlet of the manifold is where I don't know what fittings to use.

    I've done some searches and the pictures that I could find are hard to see the detail of what is going on in the box.

    If any of you have any experience with these please let me know. I'd appreciate the help.

  2. Tom Tom

    Tom Tom LawnSite Bronze Member
    Posts: 1,278

    Run copper to the dura manifold.

    In this order, copper female adaptor, sch80 bushing, dura manifold
  3. DanaMac

    DanaMac LawnSite Fanatic
    Posts: 13,156

    If you are unable to make the copper connections as Tom listed, since the copper work is done, make a transition to PVC from the copper to the manifold.

    This is what scares me though, you say then down to a PVB, then there is copper coming out the bottom of the PVB that is capped off. Pipe should not come out the BOTTOM of a PVB, it comes out the side. Either the plumber has it in backwards, or turned at a 90 degree angle which is a no-no.
  4. Wet_Boots

    Wet_Boots LawnSite Fanatic
    Posts: 47,720

    Yeah! Post a photo!
  5. the water boy

    the water boy LawnSite Member
    Posts: 3

    Can't post a photo right now. I'm out of town for a couple days. Unless I get the wife to send me one with her cell phone camera. The plumber probably has done it right and I am not remembering quite right. The copper going down toward the ground that is capped off is probably coming out the side of backflow preventer then down. Our plumber seems pretty competent so I doubt he screwed it up. More likely that I "misremembered" as Hillary would say.

    Thanks for the quick replies.

    Let me see if I understand. I'll put it into the ground put a copper elbow in. Then a copper female adapter. Then I'll screw in a pvc schedule 80 bushing (not really sure what a bushing is). Are both ends of the bushing male like a nipple?...and one end would screw into the copper adapter and the other into the swivel on the 4 port manifold?

    Hope my cluelessness isn't too annoying for ya.
  6. Dirty Water

    Dirty Water LawnSite Fanatic
    Posts: 6,799

    A bushing is a threaded or slip reducer. If the line size coming out of the PVB is the same as your manifold, you'll just need a nipple. Otherwise you'll need the bushing to adjust the pipe size.
  7. Mike Leary

    Mike Leary LawnSite Fanatic
    Posts: 21,984

    Not a problem; what's annoying is cluelessness from so-called "pros".
    The suggestions are correct for your tie-in. Plumbers and backflow devices
    have a history of incompatibility, tho. Your local water purveyor should
    have a cross-connection control specialist to inspect the installation.
  8. AI Inc

    AI Inc LawnSite Fanatic
    Posts: 25,393

    Thats because plumbers read the book. The book was written by someone who never had more then 100 customers.
  9. the water boy

    the water boy LawnSite Member
    Posts: 3

    Thanks for sharing your knowledge with me. I appreciate the help.
  10. Dirty Water

    Dirty Water LawnSite Fanatic
    Posts: 6,799

    The irony is that Mike helped write the book in his area.


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