Winterizing a Trailer Procedure

The best tool to own is a battery powered compressor with a regulator you can set at 40 lbs. You don't want to over pressurize the system. You can get a fitting that will screw onto your water hookup that will let you connect your compressor there. Find the bypass valve on your water heater and close it. Remove the drain plug on the water heater and let it drain. With the compressor running, go around opening all the faucets (hot and cold) one at a time on sinks and shower and open the toilet valve. Go around and around a few times until all you get is air coming out. If your fridge has an icemaker, unscrew the water line for that at the valve. when no more water comes out anywhere, you are almost done. You will need a gallon of RV anti-freeze to pour a little in the sink and shower traps. Of course you should also have emptied the black and grey tanks, too. As the other poster mentioned, you can also use the RV water pump to pump the antifreeze through the system but if you blow it out good, that's not necessary.