What would cause grimy black specs coming from the hot water side after shutting off the water supply for a short time for plumbing repairs. Every faucet had it for about 1 minute of running after turning back on the water supply. Hot water heater is a 60 gal 1 year old AO Smith. All copper pipes. We do have well water and also have a whole house salt treatment system that I make sure is always filled. The texture of the black grimy stuff is kind of slippery and leaves a trace when you try to wipe it up. It did eventually drain after leaving the water running and as I said the water did go clear after about 1 minute of running.
Done a fair amount of plumbing work and never seen this much stuff come out of the faucets.
Done a fair amount of plumbing work and never seen this much stuff come out of the faucets.
