just did mine a couple of hours ago. i start by draining the hot water heater from outside. (small nylon plug). then i open my low point drains. mine are just next to the waste gates. i then hook up a air commpresser to my city water inlet. (either regulatre the psi to about 30 psi or make sure something is always open, like a sink faucet. i then blow all the water out of everything, sinks, showers-inside and out, pull the handle on the toilet get all the water out. some stop there. i also add rv antifreeze. you need to turn your bypass valves on your hot water heater. just turn them oposite of what they are now. you dont want antifreeze in your hot water heater or your fresh water tank. then find your water pump and you'll see a piece of hose w/ a ball valve. you need to turn that valve and put the hose in a one gallon container of antifreeze. that will pick up the antifreeze when you turn your pump on. then go from faucet to faucet and anything else until pink comes out . at the end i put a little down the toilet so the back of the black tank waste valve is protected also. i can do it with one gallon, but for your first time pick up 2 or 3. good luck.
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