ticki2 wrote:
Having flushed more than one water heating tank I would not want to return from it to my fresh water tank . But that’s just me
I can guarantee you there is not much difference in internal appearance between your home hot water heater and your RV water heater. Being from Seattle, we enjoy as clean and soft water as you can get anywhere so inside the tank doesn't look too bad. I have never gotten a cup of water heater water at any sink location that looked in the least bit questionable. I have no problem drinking hot water in the shower or brushing teeth. Never had a problem with it. Even so, the amount that will find it's way back into the fresh tank is small so I'm just not worried. If it really bothers you, you can connect the return line to just between the tank and the pump. That way, tank mixing will be nearly 0 and the loop water will simply be drawn into the pump and recirculated immediately back to the water heater.
