facory wrote:
Blowing the lines is risky because you cannot get the water out of the 12v water pump. Best method is to put 4 gallons of pink antifreeze into the fresh water tank. Turn the bypass settings so that antifreeze bypasses the water heater. Pump the antifreeze through all faucets until it turns pink. Run enough water to fill the 'P' trap. Run it through the shower and the outside shower. Run some into the toilet and leave about an inch above the drain. With that done - you're done. Protected for the winter. Quick & easy. Come springtime pump all remaining antifreeze out of the fresh tank. Fill with fresh water and pump it all through the water system to clear out the antifreeze. Drain and refill fresh tank until all antifreeze is gone. Done. Enjoy the 2016 camping season.
putting AF in your freshwater tank is probably the worst thing you can do. By the time you flush enough of it out to get the taste gone it will be time to winterize again.
My 12V pump has a bypass built in (which is where I sucked the AR just to protect the lines and pump).
I will keep an eye on the temps. If it looks like it will stay above freezing I will fill the tank up with water so we have something to shower and dishes. I will experiment with blowing the lines again. Now I have a better understanding of all the drains and lines.