For the curious, read on.
I remove the city water inlet plug to allow the water to drain from it to the check-valve, replace cap later. My fresh water tank does not have a drain, so I have to pump it out, I should probably add a drain to it. After it is empty, I open the drain on the water heater and open all the faucets. After that is complete, I switch the valves on the water heater to bypass, switch the intake valve to the jug-inlet, and attach the hose that goes to the anti-freeze jug. I close all the faucets but the kitchen cold and turn on the pump until I get anti-freeze, close the cold, open the hot, etc. Same with the bathroom sink, but I flush the shower hose as well. I also make sure enough goes down the traps to dilute/displace any water. With all faucets closed, I allow the system to pressurize to take on a total of 1/2 gallon of anti-freeze. I have to make sure my accumulator gets filled/diluted as well. Then I relieve the pressure in the system with a faucet. I have a monomatic toilet, so I just make sure it has dumped to the tank. Lastly I make sure the grey/black water tank is drained.
