Galvanized Supply Line?

Discussion in 'Irrigation' started by txirrigation, Aug 5, 2011.

  1. txirrigation

    txirrigation LawnSite Senior Member
    from Texas
    Posts: 977

    Well we ran across a first today. What are the reliable ways of tapping a galv supply pipe?

    Thanks in advance!
     
  2. Wet_Boots

    Wet_Boots LawnSite Fanatic
    Posts: 47,009

    Maybe the safest way is with a waterworks compression tee.
     
  3. irritation

    irritation LawnSite Gold Member
    Posts: 3,201

    Brass compression tee. Depending on how old it is and water quality, you may need to ream it out first. I've seen 1" galv pipe clogged from the street to the house at about 1/4" inside diameter.:)
     
  4. greenmonster304

    greenmonster304 LawnSite Gold Member
    Posts: 3,049

    Good luck. Back in may I did a job that had a 2" galvanized service line from the street. I tapped inside the crawl space where it turned to CU and got about 7 gpm at 40 lbs. It sucked. I imagine that the 2" is closed up to about 1/2".
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  5. mitchgo

    mitchgo LawnSite Silver Member
    Posts: 2,769

    Boots or irritations ways are really good

    Personally I would tap new threads on the galvi and install 2 unions on either side of the tee, or use the meter's union.
     
  6. Replace the galvanized. Like Irritation says it's probably 1/4". I flat will not work on a galvanized irrigation system or tap into a galvanized line and Dallas had plenty. Copper shortages especially during the Korean War led to a few getting put in.
     
  7. SoCalLandscapeMgmt

    SoCalLandscapeMgmt LawnSite Bronze Member
    Posts: 1,751

    Cut it, thread it and use SCH 80 unions and tee to make your connection
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  8. SoCalLandscapeMgmt

    SoCalLandscapeMgmt LawnSite Bronze Member
    Posts: 1,751

    We still have one account with an all galvanized hydraulic system..... Any time we have issues we ut and thread.
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  9. mitchgo

    mitchgo LawnSite Silver Member
    Posts: 2,769

    It's not wise at all to thread a metal male fitting into a plastic female
     
  10. SoCalLandscapeMgmt

    SoCalLandscapeMgmt LawnSite Bronze Member
    Posts: 1,751

    Done it many times on a 2" galv main with about 85psi. The key is to use SCH 80 and to not over tighten the PVC fittings. Never had a failure yet. I've got repairs like this that have been in the ground for 15 years with no problem!
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