Winterizing is the same regardless....
I'll assume you have a hot water heater and not a hydronic system such as an AquaHot.
I'll assume that if you have a hot water heater it's bypass is set for winterization.
I'll assume you have a short hose from the INLET side of the water pump that has a valve at a "T" to allow you to place that hose in the pink antifreeze and when the pump is energized it draws from the gallon jug rather than the fresh water tank.
I'll assume all your low point drains are already drained and shut off.
Once hooked up to the gallon jug, with all water taps closed, energizing the water pump should begin to draw antifreeze into the system and the line should build pressure and the pump will shut off. Go around to each faucet one at a time and run the hot until pink runs, then cold, till pink runs out - repeat for each faucet - don't forget the outside shower, don't forget the icemaker if equipped. The same goes for the washer/dryer, simply place it into a wash mode and it should begin to fill, once pink antifreeze is entering you can shut the unit off.
94-Newmar Kountry Star 40-KSDP
Spartan/Cummins 8.3C-300HP/Allison 3060 WTEC-II/25yr RV Tech RVIA Certified/Onan-Cummins Certified