On our 2011 Elk Ridge the access panel to the water heater valves is under the fridge. It's a piece of paneling that has 4 screws I have to remove to get to the valves, it's on the back side of the HW tank on the inside of the rig. Also our water pump is behind the bulkhead behind the UDC, you'll probably have to use a magnet like Dan said or a flashlight to find the screws...the heads are painted black & there is one in each corner. I can remove the two screws on the corners nearest the UDC, and pull it out enough to reach in & turn the valve, and reach the hose to winterize the rig. Yours is a different floorplan, and newer so it'll probably be different.