Forum Discussion
Bobbo
Mar 06, 2016Explorer III
In that last drawing, eliminate the top tank completely. Have the sink drain directly into the bottom tank. Have the bottom tank's roof vent do nothing else but vent that tank.
Like DrewE said, you definitely must have a p trap below the shower.
That will be a workable solution.
Like DrewE said, you definitely must have a p trap below the shower.
That will be a workable solution.
About Technical Issues
Having RV issues? Connect with others who have been in your shoes.24,343 PostsLatest Activity: Dec 13, 2025