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copper pipe turning purple??

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  • copper pipe turning purple??

    While replacing a 4" RP device, the copper pipe I demo'd is stained purple on the inside and did not smell good. Kinda smelled like an old sewer. What would a city put in the water that would cause this?

  • #2
    Re: copper pipe turning purple??

    Originally posted by plbrx View Post
    While replacing a 4" RP device, the copper pipe I demo'd is stained purple on the inside and did not smell good. Kinda smelled like an old sewer. What would a city put in the water that would cause this?

    A friend of mine had some fittings turn purple on him during storage, the manufacturer said copper was turned purple by acetylene and related compounds.

    It's the only time I've seen or noticed purple copper, it would seem doubtful these compounds would be present in potable water though.

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    • #3
      Re: copper pipe turning purple??

      Any Silver Soldered / Brazed fittings attached? Was Acetylene used to (desolder)?

      Doing HVAC brazing all the joints turn purple...

      Hmmmmm I like a mystery.

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      • #4
        Re: copper pipe turning purple??

        Just as a side note, acetylene in contact with copper will form copper acetylide, which is extremely explosive. For this reason acetylene is never piped in copper.

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        • #5
          Re: copper pipe turning purple??

          Did someone accidently connect it to a reclaimed water line?

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          • #6
            Re: copper pipe turning purple??

            Was the 4" RPZ on domestic or fire line?

            If on fire line I could see contaminants causing this over period of time but if on domestic, I wouldn't be drinking the water

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            • #7
              Re: copper pipe turning purple??

              are you sure joey wasn't visiting

              even her car is purple.

              she was in washington last month

              d.c.

              rick.
              phoebe it is

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