Black water runs out in bathtub faucet.
Here is my problem I got. New house 4 years old. Well water. Kinetico softener installed. Whole house filter i believe 10 micron. Electric hot water tank. No odors in water at all. I am noticing on my hot water when we fill our tub in the master bathroom the hot water will run then turn black and then clear up a little then black or gray water out of it. This tub has two water valves with no aerator installed just a fill faucet. When you fill this tub you can really hear the water noise of it running in the house. The other tub / shower combo has a rotary water temp flow valve and we never see any black in it when filling. I'm guessing the master tub flows the water so hard it sucks up sediment from the hot water tank. The black stuff is like a charcoal silt, fine black stuff, sometimes smears black when wiped. How do i stop this? tried to drain hot water tank no change really problem still there. Tried to shock/bleach well no real change noted still black. Then forgot to change the filter after and waited about a month or so later and the filter was solid black. Installed new filter. still black water at times. Checked filter again filter is clear now, but water when filled runs clear the black starts again. Where is this black coming from? Thought anode rod? should i change the types of valves on the tub to slow the water flow? sometimes i think if i fill it slow its better. But definitely if you run it full bore it turns black. Tried to just let it run it slowly got a little better. Then shut off wiped out tub, ran again and it returned black again. Please help. I am very mechanically inclined and have no problems doing what it takes to fix this myself.