Darren Posted October 15, 2016 Report Share Posted October 15, 2016 Has anyone seen this before and what is the cause? House built in 1980. Click to Enlarge 45.97 KB Quote Link to comment Share on other sites More sharing options...
Bill Kibbel Posted October 15, 2016 Report Share Posted October 15, 2016 It looks like "flux induced corrosion". Plumber didn't wipe the joints. 1 Quote Link to comment Share on other sites More sharing options...
Charlie R Posted October 16, 2016 Report Share Posted October 16, 2016 I agree with Bill, my home was built in 1969 with copper supply and drains, and I have about half the joints looking like your photo. Quote Link to comment Share on other sites More sharing options...
Stewart333 Posted December 5, 2016 Report Share Posted December 5, 2016 The same in my house, all copper pipes... Quote Link to comment Share on other sites More sharing options...
dennispalmer Posted July 18, 2018 Report Share Posted July 18, 2018 It normally happen to copper pipes. I have seen the same issue with all copper pipes in my old house that was built in 1975. It is caused by an excess amount of flux residue. Quote Link to comment Share on other sites More sharing options...
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