One possibility: if there is an aerator on the spigots (a screw cap on the end with a little mesh in it designed to spread out the water flow a bit), unscrew it and see if there is disintegrated slimy black gunk inside from old washers. I found a sink like that in an old DC apartment once.We have rural water which in our case is the same as city. It is an electric water heater. About six years old. I t has been doing this for about four years. Rheem customer service has been no help.
The soot particles are oily and will smear around the edges of the tub or sink. It is definitely worst in the tub. I think because of the volume. When it is bad, it looks like someone took black spraypaint and made a ring around the tub. When you wipe it off, it smears. It does come up with abrasive cleansers. If you put it in a glass pitcher, it is spread throughout. Not like a film on the surface. The tank has been drained and flushed once a month for six months. It helps for a week or two. Somebody suggested it was an anode. We just installed new pipes and fixtures in a remodel. Thinking we need a different water heater. This was recommended by the Rural electric cooperative when we bought it.
Thank you. I replaced the sharkbite flex lines with copper flex and haven't seen anymore of the soot! :thumbsup:All copper flexible lines will work and last a long time.
Or these 100% stainless lines
Whats happening is Chlorine in your water is eating the rubber in your current flez hoses.
Trouble shot this problem a long time ago for a customer . I was the third plumber that actually fixed the problem.
It also will occur on individual faucets with flex lines and a rubber hose core.