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  1. #1
    Join Date
    Jun 2002
    Location
    Dacula, GA
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    Underground Pipe; Ductile Iron Pipe vs K Copper Pipe

    Which is more preferred in the 4" to 8" range? Total cost, longevity, etc. How about it aces? Thank you very much
    "I could have ended the war in a month. I could have made North Vietnam look like a mud puddle."

    "I have little interest in streamlining government or in making it more efficient, for I mean to reduce its size. I do not undertake to promote welfare, for I propose to extend freedom. My aim is not to pass laws, but to repeal them. It is not to inaugurate new programs, but to cancel old ones that do violence to the Constitution."
    Sen. Barry Goldwater

  2. #2
    Join Date
    Jul 2018
    Location
    Wisconsin
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    Poly.

    Sent from my SM-G960U using Tapatalk

  3. #3
    Join Date
    Jan 2010
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    You doing a water line ?

  4. #4
    Join Date
    Sep 2005
    Location
    Atlanta GA area
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    40,803
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    We do not chase plumbing work...

    However what I see with replacement of water lines (small)...
    Is PEX.

    Not sure if that is what you are asking about...
    GA-HVAC-Tech

    Your comfort, Your way, Everyday!

  5. #5
    Join Date
    Feb 2016
    Location
    Louisburg Kansas
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    I would use PVC type or FRP underground. With iron type you have to worry about cathodic protection. Coatings are OK unless you have a holiday (flaw) in the coating and then the pipe will deteriorate rapidly at that point.
    No man can be both ignorant and free.
    Thomas Jefferson

  6. #6
    Join Date
    Jan 2010
    Posts
    16,566
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    Quote Originally Posted by WAYNE3298 View Post
    I would use PVC type or FRP underground. With iron type you have to worry about cathodic protection. Coatings are OK unless you have a holiday (flaw) in the coating and then the pipe will deteriorate rapidly at that point.
    I had to repair a leak on a 6" underground cast iron water main.
    Seems a limestone had been up against it all those years and corroded a hole in it. By the time we got the water off it was a 30' geyser. Bought a stainless band that goes around the pipe and gets bolted together.

  7. #7
    Join Date
    Feb 2016
    Location
    Louisburg Kansas
    Posts
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    Yeah VTP99. Once a cell action gets started the result isn't pretty. Several years ago I designed a tower water system that had buried 24" diameter schedule 40 steel pipe. The design included a state of the art cathodic protection system that failed the test for adequate protection. Ironically after a lot of hair pulling trying to figure out why the contractor called and said the wire securing the ID tag for the isolation flange where the pipe entered the ground was wrapped around both sides of the flange. That of course defeated the protection. He removed the tag and all was good.
    No man can be both ignorant and free.
    Thomas Jefferson

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