We recently had to have one of the elements replaced in our 12 yr old 40 gal hot water tank. Ever since we are getting quite a lot of sediment in only our hot water. I have drained the tank completely and then when it filled, I ran only hot water through all the taps for over 25 min. I thought that would flush the system and the problem would be solved.... not happening!!
The sediment looks sandy with black specks. When I rub the black spots, they leave a rusty streak.
What can I do to fix this. We have city water(Tampa, FL) and the house is as old as the hot water tank. To my knowledge, we do not have mixed pipes...all are plastic.