I removed the access panel under the bathroom sink and didn't find any valves. Just the backside of my outdoor shower, tees for the sink, shower and outdoor shower hot and cold connections. There is a interior style vent just above the trap for the sink. Nothing else.
There is an access panel on the side of the shower tub, I'll check in there tomorrow.
On the outside where I see the leak I don't see any access panels on my slideout. The leak must originate above the frame somewhere. I have an extended warranty and plan to call to verify if this might be covered. If so, I'll probably take it in. Really hate going to the service bay with my TT, but I also don't feel like opening the underbelly and finding a huge, wet insulation mess...
2005 Ford Excursion Diesel 4X4 with Roadmaster Active Suspension, F350 1 3/16" rear sway bar, Bilstein shocks & steering damper.
2012 Sprinter 311BHS