Originally Posted by BooBoo23
Some bypass systems only have 2 valves to turn and have a check valve on the output of the water heater, so you may be OK. Some have only 1 valve. My current RV has only 2 valves, my old RV had 3 valves.
Sunseeker has 3 valves--in, out, and bypass. For winter, in and out should be closed (perpendicular to the pipe) and bypass open (parallel to the pipe).
2012 Forest River Sunseeker 2300 Chevy