SCH 80 Nipple vs. Male Adapter

Discussion in 'Irrigation' started by PurpHaze, Oct 9, 2005.

  1. PurpHaze

    PurpHaze LawnSite Fanatic
    Posts: 5,496

    Didn't want to highjack a thread either with a discussion about the differences between SCH 80 nipples and male adapters for connecting valves. Here's a picture (hopefully sized appropriately) on a main line repair we did this week that clearly shows the angle configuration and TOE nipples we use. The valve originally ran with the main line but we decided to set it this way and reconnect using 2" 90s (pressure loss not a problem) because a 110v conduit to a parking lot light was placed in the same trench. This conduit was putting too much strain on the original valve location as it butted right against the valve body originally. This is a new school site (1 year old) that I didn't have inspection responsibilities for because it was total new site construction.

    Four Creeks Mainline Repair WP-01.jpg
     
  2. Dirty Water

    Dirty Water LawnSite Fanatic
    Posts: 6,794

    I prefer side feed valves, but on larges valves like that I do use the sch 80 nipples.

    Do you use nipples on 1" inlet valves?

    BTW, I see you use the same waterproof gelcaps as I do, except I get black ones.
     
  3. PurpHaze

    PurpHaze LawnSite Fanatic
    Posts: 5,496

    We prefer the angle configuration because there actually is less friction loss going this route. We also stock various TOE nipple lengths (2x6, 2x12, 2x18) so we can cut to desired valve height depending on how deep the main line is.

    Yes. We also use them on 3/4" valves.

    Those in the picture are 3M DBY (direct burial w/ yellow wire nut) connectors. We use these and DBR (red wire nut) if we have more than three wires to connect. The wires are temporarily wrapped around the valve stem so it stays in place during the backfill process. When the valve box is finally set we unwind it. I've seen wires trapped so tight under the backfill soil or edge of the box where the actuator can't be used because the wires are so tight.
     
  4. Wet_Boots

    Wet_Boots LawnSite Fanatic
    Posts: 48,041

    One more trick you can do with TOE nipples<br><img src=http://img348.imageshack.us/img348/6049/eightvalvemanifold23fz.jpg>
     
  5. Dirty Water

    Dirty Water LawnSite Fanatic
    Posts: 6,794

    Boots, I do the same trick with 3/4" Dura male adapters...nest right into a 1" fitting.

    And if you had made the last fitting a cross, you could have squeezed one more valve in there :D
     
  6. Wet_Boots

    Wet_Boots LawnSite Fanatic
    Posts: 48,041

    I would consider the Dura ¾" crosses if I weren't using poly pipe. Rainbird is now selling manifold crosses and manifold tees (see their MAN-X fitting) that would make it even more compact.
     

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