Originally Posted By: dlott This post was automatically imported from our archived forum.
I bet if someone rubbed the sediment buildup off the fittings it would be a very slow water leak at both fittings. Probably an improper crimp on fitting. If not that, maybe electrolysis coming from downstream connection. I can’t see what the solid copper pipe attaches to. If it is galvanized without a dyelectric union, then that might be a issue. Doubt it though since the poly tubing should serve as a barrier on the poly to poly connection. My guess is very very small leak that is temporarily stopped by the sediment buildup.
Originally Posted By: ddivito This post was automatically imported from our archived forum.
I have seen copper fittings corrode like this on ‘all copper’ systems when the crawlspace is very damp. I haven’t seen it in poly fittings, but I wouldn’t be surprised.