Winterize a residential fridge
I used compressed air. You can purchase the adapter to screw onto the fresh water inlet at most RV parts stores. I set the air compressor regulator on 40 lbs and let the ice maker cycle 3 or 4 times. The water valve opens and it continues to make ice but the last time there was a light mist that barely blew out of the ice maker water inlet into the tray. It worked for me and no yucky pink antifreeze. Blow all lines and pour antifreeze down the traps.