First off when blowing out the water lines DO NOT use a gas station air hose to do it as they usually have a lot of moisture in it. I use an air compressor that I bought at Wal-mart made by Haus Canfield. I use the same one to fill my tires.
The next thing is to remove hot water heater drain plug and then open pressure relief valve to drain hot water heater. After it is drained I would switch the valves to bypass mode and reinstall plug. Then hookup blow out plug to fresh water (city fill) port. connect air compressor to plug. Go turn on kitchen faucet and then turn on compressor. Move the lever betweem hot and cold, go to bathroom and open faucets then turn off kitchen faucets, and go to shower and do the same. Then go to toilet and allow all water to come out. Now all the faucets and toilet should be pushing air. Leave one faucet open and go outside and turn off compresor and disconnect. Then close all faucets.
Drain the fresh water tank. Next purchase RV Antifreeze at Wal-mart (pink stuff) and put about a cup in all the traps, kitchen, bathroom and shower. Also empty water in toilet bowl and put enough antifreeze in toilet to come up about 3 inches in the bowl.
Now you are winterized the blow out method. Depending on where you live I would winterize it with Rv Antifreeze if you are not going to use it during the winter months.
2014 Winnebago Adventurer 35P,Ford F-53, V-10
2011 Ford Escape,2000 Roadmaster Tow Dolly
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