While doing an inspection the other day I ran across the cold water lines in the basement turning black. I’ve researched the issue on this forum and found several considerations but nothing solid to hang my hat on.
One other thing noted by the home owner was that at the kitchen sink, when they first turn on the cold side of the faucet (two handle faucet) it will run very warm to hot for a short while before running cold. I checked the basement and didn’t see anything that would be causing the cold supply line to be heating up at rest. This was more prevalent when the faucet wasn’t used for a considerable time.
Don’t know if these two issues are related or separate.
Any thoughts? There was some recent drywall work done in the basement within the past year, but I would have thought that Chinese drywall would be out of circulation and therefore, not something to consider.
Thanks for the feedback in advance.