Kinks!

Discussion in 'Irrigation' started by Dirt Boy, May 16, 2006.

  1. DanaMac

    DanaMac LawnSite Fanatic
    Posts: 13,156

    But how can the homeowner drain the manifold or mainline without a drain? That in itself will save a ton of headaches if they don't have it blown out. Maybe I'm missing how else the water can exit the manifold. Just opening the bleeded screws can't possibly get all the water out can it?

    I know you're in NYC, but do you not get enough of a frost line there?
     
  2. Wet_Boots

    Wet_Boots LawnSite Fanatic
    Posts: 47,003

    I'll winterize my own installations, even if I don't get a call from the new homeowner. There is no outdoor water remaining to be concerned with.
     
  3. DanaMac

    DanaMac LawnSite Fanatic
    Posts: 13,156

    So you'll winterize the system even if they don't ask you to, and then bill them even if they aren't expecting it? I'm not trying to cause any problem here. Just trying to figure out why no mainline drain to help prevent major damage if they don't blow it out.
     
  4. Wet_Boots

    Wet_Boots LawnSite Fanatic
    Posts: 47,003

    And where would this mainline drain be located, and why would any warm-weather transplant be looking for one? It's the service that keeps the system undamaged. It isn't too much of a burden to do a few winterizings for unknown new owners, and usually they are very grateful to have dodged the ice bullet.
     
  5. greenhorn123

    greenhorn123 LawnSite Member
    Posts: 53

    lol, i guess you dont know what you dont know.

    i,ve installed over 1,000 myself and 90% of the companies do it here in new england. i worked for a company that had over 2,500 customers and about 2,000 were thier own installs over the last 10 years.

    all used poly 1" poly pipe from the back flow out, but now you knuckle heads will tell me it doesnt work?

    i better start calling the hunreds of thousands of people here that thier mainline is gonna blow soon. lol
     
  6. DanaMac

    DanaMac LawnSite Fanatic
    Posts: 13,156

    Poly mainline I feel is fine. The manifold set up with the valves, IMO, is not. So you have insert tees as manifold tees? With poly in between them?
     
  7. Wet_Boots

    Wet_Boots LawnSite Fanatic
    Posts: 47,003

    There is poly pipe, and there is poly pipe. I pull utility pipe for my installs, and never use it for constant-pressure use. If I did, and had problems, the manufacturers would inform me that non-NSF pipe is not warranted for constant-pressure applications. I'll never personally know what track record the constant-pressure use of non-NSF pipe has, because I just won't go there.

    Above ground use of NSF poly isn't inherently unreliable, but it is less durable than other materials. And it also has less bursting-strength headroom than PVC or copper. With a static pressure over 100 psi, I could see water hammer doing some damage to mainline poly.
     
  8. PurpHaze

    PurpHaze LawnSite Fanatic
    Posts: 5,496

    Yup... prolly the reason we have one 4" poly main and another one that is 3". However these are HDPE. :laugh:
     
  9. greenhorn123

    greenhorn123 LawnSite Member
    Posts: 53

    yup and thats how most do it here. the valve will have to be changed before that breaks, bursts, leak or whatever you think is gonna happen. then you can just cut the poly out change the valve put a new piece in and clamp it.
     
  10. Dirty Water

    Dirty Water LawnSite Fanatic
    Posts: 6,799

    Heh, you have never seen water hammer blow out a insert fitting?

    I built two real nice PVC manifolds this morning, I wish I still had my digital camera.
     

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