Here is what I think I know! : - )
The only drain you need to find is the fresh water tank. Should stick straight down out of the tank. Looks just like the end of a garden hose.
Then! 1) Bypass the water heater. It should be pre-equiped with a bypass.
2) Unscrew the anode rod from the water heater to drain it. Leave it out for the winter 3) There should be a valve near your water pump; one way goes the the fresh tank and the other to a short hose. Turn the valve to the short hose. This hose will be used to suck the RV anti-freeze into the system. 4) Buy about 3 gallons of pink RV anti-freeze 5) Stick the short hose in the bottle. 6) turn on each hot water faucet, one by one, until pink. don't forget the shower hose and outside shower 7) replace RV anti-freeze bottles as they empty 8) turn on each cold water faucet on by one until pink 9) now run toilet until pink 10) make sure each sink/tub trap has enough pink in it not to freeze 11) perhaps first but make sure black and grey tanks are emptied. doesn't hurt if some RV Anti-freeze gets in tanks 12) might also want to go outside, find the city water inlet, take out the screen, push the little valve to get pink in the city inlet. keep your face out of the way or you'll get a face wash! 13) disconnect your battery and put a battery minder on it to keep it charged and minimize sulfation 14) thank yourself for doing an easy job and saving yourself $150.
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