Winterization fifth wheel residential fridge and washer?

I use less then 4 gallons total when I pump it thru the system, I usually run at least one cycle in the washer to make sure there is plenty in both the hot & cold side plus the drain. For the fridge I change the filter ( keep a old one ) and run as much as i can thru the water system, so far I have had no problems. Antifreeze is cheaper then repairs, lol