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poly pipe sizing

Discussion in 'Irrigation' started by mitchgo, Oct 1, 2011.

  1. mitchgo

    mitchgo LawnSite Silver Member
    Posts: 2,758

    I'm going in on monday to our supplier to see if it fits but I'm seeing if anyone may know this.

    Would 160psi 3/4 poly fit inside a 1" 200 psi poly line?
     
  2. 1idejim

    1idejim LawnSite Fanatic
    Posts: 8,824

    hunters blue book gives the id/od/wall thickness of poly mitch:)
     
  3. Wet_Boots

    Wet_Boots LawnSite Fanatic
    Posts: 46,442

    the question really doesn't have an answer, because the poly pipe dimensions can vary according the resin used
     
  4. mitchgo

    mitchgo LawnSite Silver Member
    Posts: 2,758

    Theoretically it will fit. Based on the od of the 3/4 and id on the 1"

    It appears pex will work too

    I have a service line leak 4' under a driveway- The gas line intersects the water line under the driveway so using a mole is out of the question..

    Aside from cutting up the road - I was thinking of using the existing piping as a sleeve and shove a new pipe it
     
  5. Mdirrigation

    Mdirrigation LawnSite Silver Member
    Posts: 2,455

    there is a tool that the plumbers use to pull a new service line thru an old pipe , generally the old blue polly, you pull a cable thru the pipe and attach a metal device on the end , it slices the old pipe splitting it and pulls in a new pipe as you go .
     
  6. Waterit

    Waterit LawnSite Silver Member
    Posts: 2,879

    I'm not a poly guy and don't know poly flow rates, so I don't know if this will work for you.

    We recently had a similar problem with a broken 1-1/2" PVC main under a driveway. Our fix was to shove a piece of 1" through the existing broken pipe and reconnect it on either side. The reduced flow for the 16'+/- under the driveway didn't affect system operation at all.
     
  7. Wet_Boots

    Wet_Boots LawnSite Fanatic
    Posts: 46,442

    PEX would work, as would any 3/4-inch CTS tubing, but for SIDR-9 3/4-inch IPS poly to fit inside SIDR-9 1-inch IPS poly, don't count on it happening.
     
  8. greenmonster304

    greenmonster304 LawnSite Gold Member
    Posts: 3,013

    I think you are talking about pipe bursting
    Posted via Mobile Device
     
  9. Wet_Boots

    Wet_Boots LawnSite Fanatic
    Posts: 46,442

    Same idea ~ anyone making use of the newer PE4710 poly pipe?
     
  10. Mdirrigation

    Mdirrigation LawnSite Silver Member
    Posts: 2,455

    No this isnt bursting , they use a winch or a cable hooked to a truck and pull the new pipe thru the old while splitting the old .
     

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