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WM Nitro

Discussion in 'Irrigation' started by Sprinkus, Sep 23, 2011.

  1. Sprinkus

    Sprinkus LawnSite Silver Member
    Messages: 2,310

    Anyone else had this happen?
    I never use these valves for installs but the existing front yard already had them installed. Figured I'd try to keep the valves all the same.
    My guy glued a piece of sch 40 into the valve and heard a "crack". He pulled the pipe back out and this is what we found.
    I put a piece of pipe in there to hold the crack open for the picture.
    This is one of two valves that cracked. I returned them and installed my go to valves instead.

  2. Kiril

    Kiril LawnSite Fanatic
    Messages: 18,334

    I've had that happen on glue fittings before. The only thing I can think that could have caused it (other than a defective fitting) was dull cutters created a lip which exerted too much pressure on the fitting when inserted. At least it cracked immediately and not a couple of days after you pulled off the job.
  3. Wet_Boots

    Wet_Boots LawnSite Fanatic
    Messages: 50,582

    Were the front-yard valves also slip connections? As for a lip on the pipe end, you should be beveling those.
  4. Kiril

    Kiril LawnSite Fanatic
    Messages: 18,334

    Not gonna happen on 1" and under pipe.
  5. Wet_Boots

    Wet_Boots LawnSite Fanatic
    Messages: 50,582

    I bevel every single end, but this is for manifold construction and 24/7 pressurization plus water hammer.

    One other thing bothers me about that valve. It looks like they just re-used the mold of the older threaded-end valve, and modified it for slip connections. But maybe that isn't a problem if the molding is done properly. The threaded-end valves are made of a different (friendlier) plastic than the slip valves.

    Messages: 18,668

    Looks like the chinese changed things on a WM product again.
    Posted via Mobile Device
  7. Kiril

    Kiril LawnSite Fanatic
    Messages: 18,334

    I'm thinking it is just a TX thing.
  8. SoCalLandscapeMgmt

    SoCalLandscapeMgmt LawnSite Silver Member
    Messages: 2,144

    It's a freakin Weathermatic! That explains it right there. You could at least use a Rain Bird DV. Sure there is a 95% chance that it won't ever turn off but at least the body won't crack! :dancing:
  9. Wet_Boots

    Wet_Boots LawnSite Fanatic
    Messages: 50,582

    PVC must be trickier stuff to mold than other common plastics, as witness the lack of competition for Richdel, in its early days.
  10. Mike Leary

    Mike Leary LawnSite Fanatic
    Messages: 23,158

    Something about slip valves bothers me.

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