Just wondering how the black and grey tank vent system work in my 2013 19'?
My furnace stopped working so I pulled it out last night and found a open vent inside furnace cabinet. The drain piping is coming from the bathroom sink and there is an open tee on the line. I assume this is the vent for the grey tank? I thought it would have vented to the roof or at least outside somehow. Is it normal for it just to be open like this to the inside of the trailer?
Photo of vent
I leave the shower drain plug installed when not in use so it looks like this vent would be the first point to overflow if the grey tank was overfilled. A very unfortunate place to have an overflow because there is no access.
Does the black tank vent through the round vent cap on the roof of the trailer?