CaptnDean, tlhurlbut is correct. I have a 2009 Camelot with the same tank, in the same place. There should be a rocker switch for normal/winterize. Fill the tank with RV antifreeze, set the switch to winterize and using the water pump, open all the faucets, shower (both inside and out), washer and the icemaker. Also there are a couple of inline valves next to the tank that need to be turned on as seen in your picture. The hardest part is getting the fluid in the tank. Remember to put the switch back to normal when you use it for the first outing or you won't get water from the tank.