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Old 03-12-2012, 10:01 PM   #1
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Corroded copper piping


Hi, I have copper piping that has a spot that has corroded to a green color and is now leaking a few drops a day. Have well water. Anybody know why this would have occurred??

Corroded copper piping-image-3434056938.jpg

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Old 03-12-2012, 10:22 PM   #2
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Corroded copper piping


Unless there is another dissimilar metal making contact with the pipe I would guess that they didn't clean the Flux that dripped onto it when the put it in.

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Old 03-12-2012, 10:23 PM   #3
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Corroded copper piping


Was it in contact with anything steel?
If not you must have some really corrosive water.
I'd change every inch of it with Pex tubing.
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Old 03-12-2012, 10:36 PM   #4
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Corroded copper piping


That looks like exterior corrosion, I like the thought that there was some flux left on the pipe. Flux is typically acidic, and if not wiped off carefully, can cause corrosion. corrosion caused by acidic water typically eats holes in the pipes from the inside out, I know, my acidic well water destroyed all of my copper pipe after about 40 years of service. Replaced it with PEX. But the corrosion looked nothing like what you showed, it was entirely pinhole leaks, both in the pipe and at the solder joints.
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Old 03-12-2012, 10:39 PM   #5
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Corroded copper piping


Well contact with dissimilar metals. Or the wrong type of Copper pipe too could have been used they could have used DWV grade right there instead of K copper pipe I would just Cut out he bad part and replace with K Copper pipe.
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Old 03-12-2012, 10:45 PM   #6
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Corroded copper piping


Not familiar with what flux is. The copper pipes are 27 years old and all generally fine except for this strange area. Tried wrapping with silicone tape for the moment but still manages to squeeze a drip out.
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Old 03-12-2012, 10:57 PM   #7
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Corroded copper piping


How large is that pipe? (diameter)
What needs to happen is cut it out and replace the section with new pipe. It's not going to stop leaking by istelf.
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Old 03-12-2012, 11:09 PM   #8
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From the picture it looks like nothing is touching the pipe.
What was touching the pipe when you discovered the leak?
Copper Pipe will not just start leaking without a material or something causing a reaction to weaken the material.
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Old 03-12-2012, 11:23 PM   #9
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Corroded copper piping


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Originally Posted by joecaption View Post
Was it in contact with anything steel?
If not you must have some really corrosive water.
I'd change every inch of it with Pex tubing.
Joe why do you always tell people to rip it out and replace with PEX?
Seriously,do you realise how stupid you sound saying that?
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Old 03-12-2012, 11:58 PM   #10
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Corroded copper piping


There has been nothing in contact with the pipe at any point. I took a good look at all the pipes and found two similar locations... Nothing in contact with them either. I realize I need to replace the sections but find it really weird as to what is causing this. Only the one is showing a drip so far.
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Old 03-13-2012, 12:01 AM   #11
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Corroded copper piping


The pipe is 3/4 inch and the other locations are on smaller pipe. Much of the pipe have blackened through the years. Home inspector had said no concern until and if it goes green. Those locations are again independent of anything else going on. All locations are on hot water lines- reaction over time with well water??
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Old 03-13-2012, 12:11 AM   #12
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Corroded copper piping


If you can solder, or want to spend a tiny amount of $$ on SharkBite fittings, it may well be worth cutting out that section so you can see what the pipe is like in general. The SharkBite fittings would be fast and simple, and those muthas make a tight seal.
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Old 03-13-2012, 12:16 AM   #13
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Corroded copper piping


Quote:
Originally Posted by Ravenworks View Post
Joe why do you always tell people to rip it out and replace with PEX?
Seriously,do you realise how stupid you sound saying that?
Raven: (I am sure that Joe can defend himself should he choose to, but as a reminder to us all....) It may be better to spend a moment and choose your words more carefully. Just a thought. We all have opinions and we need not start ripping each other a new bung hole. (Save that for when we talk about politics!! ) Replacing the whole lot may be the most economical solution, and PEX will sure take the corrosive water better, if in fact that is the problem.
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Old 03-13-2012, 12:40 AM   #14
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Corroded copper piping


I like the shark bite fittings suggestion. I just googled them and it looks like a solution. If I understand correctly I can cut out the small sections of corrosion and add the shark bites in to make a new connection. I recall using flexible hoses under the kitchen sink with that type of shark bite connection to copper with no problems in years.
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Old 03-13-2012, 12:50 AM   #15
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Corroded copper piping


Just remember to de-burr the copper on the outside, or you may ding the O-ring on the SharkBite. I learned of them (or, the other brand, something like GatorBite) from an old school plumber a few years ago, who refused to believe in them for a year or two. He then ran into a problem where it was almost impossible to get to a pipe, so he tried the Sharks. He was a convert after several months and no leak.

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