There is no toilet vent pipe on the roof of my 2003 Fortravel U320. Any ideas where it is located?
On our coach there is only 1 roof vent for grey and black tank. Inside the cabinets here is 4 air admittance valves that makes the system work. 2 for sinks, 1 washer, 1 commode
Mike
We have the same coach as you but 2 ft longer and there's only one roof vent.
Black tank and grey tank share one roortop vent pipe.
I verified this with a water hose at top of vent years ago. (drained both tanks, ran hose down vent for bit, then drained from both tanks).