On a 2011 Elk Ridge 27RLS. I have found the hot and cold low point drains but cannot find the fresh tank drain. There is nothing else coming through the bottom membrane, and I have looked on the frame. I did find a strange device coming through side of the frame facing the center of the folding steps. See attached pic. The device had about an inch and a half flange mounted flush to the frame and in the center had an 1/8 inch steel tube protruding with a clevis pin perpendicular to the end--perhaps a handle, perhaps some kind of a stop. The device does have some give and take like it might be attached to a drain line but if it is the valve I don't know where the water would exit. I have seen the posts about where the tank is and that the drain is usually forward of the tank. That is well and good, I need to find the drain. Fresh water tank is gravity fed. No Anderson Valves. Appreciate any help.