From what I've seen, RV shower pans are mounted on a raised floor to give room for a trap between the trailer floor and the raised floor.
Can someone say why the shower drain piping is plumbed this way rather than cutting out the main trailer floor and have the trap extend below the floor? (I'm guessing that it is not done this way to avoid freezing, keep road debris from damaging the trap, and/or placing the outfall too low for the black water tank.)
The reason I'm asking this question is that I am considering building a standy with a shower, but would also like it to be "garage-able" while maintaining standing height in the shower.
Thank you for your time,
Tom