You should have 2 gallons of RV pink Antifreeze (try and get rated to -50 F if you can) to winterize the fresh water lines, water pump, and pipe traps. Getting an extra 3rd gallon on hand can be good if you over-purge a faucet, etc., since this is your first time doing this. If you do not use it this year, it will last for next year.
The gallons listed above assume you have a piping kit and hose to allow the antifreeze to be drawn directly from the jug by the water pump and then pumped into the freshwater piping. Also, your camper has a water heater bypass system, so you do not have to fill the 6 gallons of water heater with antifreeze.
NOTE: The water heater and fresh tank must be drained when you do the above winterizing process.
If your camper does not have the water pump antifreeze suction kit (known as a winterizing kit) or the water heater bypass system, there are ways around this, but we need that info from you to help better.
I hope this helps,
Current Sunlines: 2004 T310SR, 2004 T1950, 2004 T2475, 2007 T2499, 2004 T317SR
Prior Sunlines: 2004 T2499 - Fern Blue
2005 Ford F350 Lariat, 6.8L V10 W/ 4.10 rear axle, CC, Short Bed, SRW. Reese HP trunnion bar hitch W/ HP DC
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