So my question is: If there is NO SINK in the bathroom is that vent pipe still there? Does it also vent the shower drain?
If it is there I would want easy access to it so I can install the Oaty Sure Vent Valve.
I don't have a problem with a vent stack in the trailer as it is commonly used in the RV industry but I still don't want an open pipe inside the trailer, especially one that is difficult to get to.