Building the perfect 1" manifold from scratch

Discussion in 'Irrigation' started by Planter, Oct 19, 2005.

  1. Planter

    Planter LawnSite Member
    from Utah
    Messages: 214

    I have been doing a lot of residential with one inch valves. I could use the prefabed manifolds, but I have been building them myself with one inch tees. A guy I work with some still sets up a tripod and builds his manifolds with galvanized pipe. I am looking for a better way to build them. Here is how I build them:

    1) I chuck up a 1X10" machined nipple in my pipe vise and thread on a valve.
    2) I cut the nipple off at 3" with a wheeled tubing cutter so the cut is smooth and even.
    3) While the valve is in the vise I thread on a male adaptor.
    4) I cement on a 1" tee and use the mold lines to keep it straight. Most go on tees, but I leave about 25% undone to assemble on site in case I need them on ells.
    5) Sip of beer here (this is a late night project in my home shop).
    6) Cut some one inch schedule 40 to 3 inches with the tube cutter.
    7) Another sip of beer
    8) When I get to the job site I assemble the manifold with three valves in a standard box and 1 main-line drain in each box.

    Is there a better way to build from scratch? I really don't like the prefab manifolds.
  2. Dirty Water

    Dirty Water LawnSite Fanatic
    Messages: 6,794

    If you use Dura Male adaptors, you can use those instead of TOE nipples, they nest. Otherwise, thats how I make my manifolds as well.

    And wheeled tubing cutter? Have you not heard of Victors cutters?

  3. Wet_Boots

    Wet_Boots LawnSite Fanatic
    Messages: 49,575

    A vise? Why not glue TOE nipples into your tees (or crosses) along with a stub of pipe where applicable? Tape up the male threads, and toss 'em in a box. Build the rest of it on the site. And don't limit yourself to just three valves per box. Think big!<br><img src=>
  4. Dirty Water

    Dirty Water LawnSite Fanatic
    Messages: 6,794

    I don't use a vise either, its just as easy to thread both male adapters into the valve and just use a pair of channel locks.
  5. jerryrwm

    jerryrwm LawnSite Bronze Member
    Messages: 1,274

    Haven't you guys ever heard of slip valves??? All that threading and twisting takes time. And how many times have you had to replace a valve body? Maybe 1 in a 100 valves, maybe 1 in 500. With those jar-top valves and even the DV it is only a matter of pulling off the cover and replacing the diaphragm/solenoid.

    Slip 1" valves outsell threaded 20 to 1 in most of the south. And I've had them in the ground for nearly 15 years with no more valve body problems than the threaded valves.

  6. Dirty Water

    Dirty Water LawnSite Fanatic
    Messages: 6,794

    Slip valves are unprofessional. It takes me less than a minute per valve to wrap teflon around two male adapters and thread them in. Slip valves are for people who can't make leakfree threaded connections.

    You do want to have an edge over Joe Home Depot right?
  7. bicmudpuppy

    bicmudpuppy LawnSite Silver Member
    Messages: 2,781

    I've never seen a slip valve at a hardware store. Threaded valves are for repair work. Slip valves are for installs. I'm w/ Jerry on this one.
  8. Dirty Water

    Dirty Water LawnSite Fanatic
    Messages: 6,794

    My home depot has both orbit and Cheapo Rainbird slip valves...Must be a regional thing.

    When I pop open a valvebox and see a slipvalve, or a prefab manifold, it gives me the same first impression.
  9. PurpHaze

    PurpHaze LawnSite Fanatic
    Messages: 5,496

    Yes... on my home system. No... on my work systems. :blob3:
  10. PurpHaze

    PurpHaze LawnSite Fanatic
    Messages: 5,496

    Or Klein "snap" cutters?

    Klein PVC Cutter.jpg

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