Closefit
New Member
While making plumbing changes in my house recently, I removed a section of supply copper pipe (cold) that was installed about a year ago and noticed that there is a green residue about 1" to 2" lengthwise, on each side of the fittings.
I was told that this is "patina". Most of it does wipe off with cold water and a paper towel, and leaves a dark, blue/green deposit on the towel.
When these pipes were installed a light coating of C-Flux was used on the fittings before soldering.
I have recenty heard about pinholes forming from flux left inside copper pipes. How likely is this to be a problem over time?
Should we expect a disaster now at some point because of the C-Flux?
Is it better to use water-soluble flux in the future or would No-Corrode or Oatey 95 prevent this problem?
I was told that this is "patina". Most of it does wipe off with cold water and a paper towel, and leaves a dark, blue/green deposit on the towel.
When these pipes were installed a light coating of C-Flux was used on the fittings before soldering.
I have recenty heard about pinholes forming from flux left inside copper pipes. How likely is this to be a problem over time?
Should we expect a disaster now at some point because of the C-Flux?
Is it better to use water-soluble flux in the future or would No-Corrode or Oatey 95 prevent this problem?