Gas-fired HW heater, 7 yrs old.
Yesterday, our hot water suddenly became quite rusty. I've filled and drained the tank 3x so far, and it's not any cleaner. It may be coming dirtier, even. The cold water runs clean. Piping to the tank is all copper. I find no sign that the tank is leaking.
Any insight on how to clear this, or even as to what's going on, would be appreciated.
Thnaks, George