Questions about gravity feed system from creek

Discussion in 'Irrigation' started by gravity, Dec 7, 2013.

  1. gravity

    gravity LawnSite Member
    Posts: 2

    1. Anybody know a good chinese supplier of pvc fittings? Recently paid $20 for a 2 inch pvc union at southern drip irrigation.

    2. My system is half pvc and half poly. I will switch to all poly as temp gets down to minus 12 in winter. I will continue to use pvc valves and unions because it is impossible to disconnect poly compression couplings in cold weather.

    3. The majority of the system is not buried so I have to allow water to drain during the winter so that there is constant flow. A dripping tap is not enough. During summer the drain is shut off. Some of the line is a few inches from ground so I will bury that. I think that will add some energy to the system during winter.
    4. A flat area of pipe near the end of the line seems to freeze first when I forget to open drain. The steeper area closer to intake takes at least a couple days to freeze.

    5. I was going to ask about how to make a gradual 90 degree turn with pvc pipe but I guess I will just use a piece of poly. Once i convert to all poly this will be moot. Currently using two 45 degree elbows.

    6. Why pvc doesnt work. a. gets fragile when cold and breaks when undoing union. b. ice expansion breaks it easily c. ice builds up on outside of pipe and weighs it down and breaks it d. plastic weld joints fail sometimes

    I guess this is more a tutorial. Hopefully, someone will not make the mistakes i made.
     
  2. greenmonster304

    greenmonster304 LawnSite Gold Member
    Posts: 3,078

    $20 for a union? Seems high even for home owner. Why don't you just blow this system out with a compressor instead of trying to get it to gravity drain?
    Posted via Mobile Device
     
  3. gravity

    gravity LawnSite Member
    Posts: 2

    The system supplies water year-round. The intake remains on through winter. The drain ensures constant movement. About .25 miles of 2 inch.

    If the flow stops,
    system freezes in few hours
    I drain the system and melt the ice. I isolate the frozen section and send water through to melt ice.
    Its minus 12. Right now and system is operational.
    I have 25 acres
    Posted via Mobile Device
     
  4. greenmonster304

    greenmonster304 LawnSite Gold Member
    Posts: 3,078

    Roger that.
    Posted via Mobile Device
     
  5. CAPT Stream Rotar

    CAPT Stream Rotar LawnSite Fanatic
    Posts: 5,908

    what needs water when it is -12?

    animals?
    people?
     
  6. greenmonster304

    greenmonster304 LawnSite Gold Member
    Posts: 3,078

    Maybe you should rent this for a few days and plop your system in the ditch.

    [​IMG]
     
  7. 1idejim

    1idejim LawnSite Fanatic
    Posts: 9,340

    Or this

    [​IMG]

    [​IMG]

    [​IMG]

    Put that pipe in the ground son
    Posted via Mobile Device
     
  8. 1idejim

    1idejim LawnSite Fanatic
    Posts: 9,340

    [​IMG]

    [​IMG]

    Ohshit. I feel the ghost of Mike Leary peering over my shoulder.
    Posted via Mobile Device
     
  9. greenmonster304

    greenmonster304 LawnSite Gold Member
    Posts: 3,078

    Is that last one a drainage tile plow?
    Posted via Mobile Device
     
  10. 1idejim

    1idejim LawnSite Fanatic
    Posts: 9,340

    No. They pre-assemble the pipe and risers and plow them in with that sled.

    Its in the ground in the first pic.
    Posted via Mobile Device
     

Share This Page