Black particles when hot water is run
Hello all,
I've done some searching on this but haven't found the answer. I've lived in my house for almost three years and just decided to fill the tub to take a bath. This only happens when the hot water is run but I get these black oily particles on the top of the water that smear when I touch them. The common source from my searching seems to be braided hoses but I have CPVC throughout my house. The only braided hoses are going to my washing machine. A little more info. Is that I have city water and I think the water heater is approximately 10 years old. It's also an NG setup. If someone can help I would appreciate it.
Thanks,
Matt