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is this a red flag?

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  • is this a red flag?

    A propress cap that has green corrosion.

    Nothing appears to be leaking right now. It is in an attic over living space.
    Attached Files

  • #2
    Re: is this a red flag?

    Looking at it closely it appears to be a flux trail. See the distinctive trail, teardrop affect under the green.

    Is it possible they applied flux to the joint and then decided to propress it instead?

    Could they have pressed over an old soldered joint and didn't clean the old flux off?

    You could lighty sand the green off and see if it comes back.


    Rick.
    phoebe it is

    Comment


    • #3
      Re: is this a red flag?

      Are you sure it's a propress fitting and not one of those fittings with the solder in the grooves that that they sell at the big box stores? They also may have taken out the press ring and soldered the cap on.

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      • #4
        Re: is this a red flag?

        You can see the press crimps when you enlarge the photo.

        Rick.
        phoebe it is

        Comment


        • #5
          Re: is this a red flag?

          I bet they cut off a solder joint and never cleaned it before pressing over the green.
          26+6=1

          Comment


          • #6
            Re: is this a red flag?

            Originally posted by PLUMBER RICK View Post
            Looking at it closely it appears to be a flux trail. See the distinctive trail, teardrop affect under the green.

            Is it possible they applied flux to the joint and then decided to propress it instead?

            Could they have pressed over an old soldered joint and didn't clean the old flux off?

            You could lighty sand the green off and see if it comes back.


            Rick.
            They capped off an old hot water hookup in an attic when they installed the tankless unit in the garage. I didn't see it before or during so I could only guess at intentions. It seems like an odd height to cap it at....about 24" from the floor. Tall enough to get in the way but way shorter than you'd expect if they just cut it at a common tank height.

            Comment


            • #7
              Re: is this a red flag?

              Originally posted by PLUMBER RICK View Post
              You can see the press crimps when you enlarge the photo.

              Rick.
              And it looks like that's where the corrosion is occurring too.
              Could they be related?

              Hot, humid attic with two pieces of metal (even though the same or very close on the
              galvanic chart) separated by a short distance, could galvanic corrosion be at work here?

              Are the fittings 100% copper the same as pipe? Could the jaws have been contaminated with
              something that was left on the fitting and changed it (electrically) or does compressing
              the fitting change it just enough in its molecular composition that electrically it differs enough
              from the pipe to set up a circuit and let galvanic action do its dirty work?


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              Last edited by Bob D.; 07-05-2013, 05:40 AM.
              "When we build let us think we build forever. Let it not be for present delight nor for present use alone. Let it be such work that our descendants will thank us for, and let us think, as we lay stone upon stone, that a time is to come when these stones will be held sacred because our hands have touched them, and that men will say, as they look upon the labor and wrought substance of them, "See! This our fathers did for us."
              John Ruskin (1819 - 1900)

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              • #8
                Re: is this a red flag?

                My concern would be the condition of the pipe prior to capping
                and what might be going on under the crimp and seal.
                If pipe was not properly cleaned, what other short cuts were taken?
                No matter the system used, proper techniques must be employed.
                IMO, sweat on a hard cap and sleep well.

                Comment


                • #9
                  Re: is this a red flag?

                  Originally posted by Big Jim View Post
                  My concern would be the condition of the pipe prior to capping
                  and what might be going on under the crimp and seal.
                  If pipe was not properly cleaned, what other short cuts were taken?
                  No matter the system used, proper techniques must be employed.
                  IMO, sweat on a hard cap and sleep well.
                  Agreed but up in a hot attic space who wants to use a torch if you don't have to.

                  This takes less time but in the end if its not reliable then its no good
                  no matter how much time or money it saves initially.
                  "When we build let us think we build forever. Let it not be for present delight nor for present use alone. Let it be such work that our descendants will thank us for, and let us think, as we lay stone upon stone, that a time is to come when these stones will be held sacred because our hands have touched them, and that men will say, as they look upon the labor and wrought substance of them, "See! This our fathers did for us."
                  John Ruskin (1819 - 1900)

                  Comment

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