What is the problem? What causes rusty water?
It is not caused by your hot water heater. If a hot water heater has enough rust to cause this condition it would have burst and flooded by now. Let’s narrow down the choices a little bit. If the rust is only in the hot side, only comes out when you turn on the hot water and comes out of every fixture in the home that has hot water, the problem is almost certainly at the incoming and outgoing pipes at the heater. Hot water corrodes faster than cold water and the fitting and pipes directly in contact with the heater should probably be replaced. If the problem is only at a certain fixture and not the rest of the home the problem is probably at the connections to the valve or at the angle stops. This occurrence most often happens when someone mixes galvanized steel fittings directly with copper. The two dissimilar metals cause an electrical current and the steel piping is sacrificed to the copper. It corrodes away very quickly. The solution would be to remove the galvanized steel piping a