Sorry, Paul....I was responding to Janey who has a 2014. The 4-way valve wasn't installed until 2013 on the 2014 models (I believe), so you wouldn't have it on your rig. In a nutshell, this valve is installed on the drivers side and has a hose connection to hook up to city/campground water supply. In essence, the four positions on the valve are: Use City Water, Fill Tank With City Water, Use RV Water Pump, Winterize. Here is a schematic from the manufacturer as to how different portions of piping are engaged when a selection is made...