The main purpose of the above posts to this point was to determine a satisfactory height of the shower pan, the primary goal of which was to provide as much headroom as possible in balance with acceptable shower draining (pan elevation in relation to grey water tank entry).
This can be pretty difficult when dealing with only 6'3" of headroom to start with!
I've received a couple of comments (both in thread and via PM) about concerns regarding DWV (drain/waste/vent), specifically in regards to proper venting for optimal draining, closure of the drain for preventing "on the road" slosh-back, and input for whether or not a trap is even needed (traps are for preventing escaping sewer gasses and other odors).
I'd like to say two things here.
1. I truly appreciate the offers of concern and the helpful suggestions. True, too much of that can become overwhelming, but I haven't seen that here. I'm sure many of you have thoughts, but have refrained because of your desire to prevent such "overwhelmingness". I appreciate that too! I'm not making a "request for input" here. But if you have something constructive to add, please feel free. Make a thoughtful choice of whether it is best offered via PM, or in thread, and go for it.
2. Previous plans can and do change. There is space and access for a sink vent on the camper wall. However it would be above the drain, but below the basin rim, not exactly proper (I think it is supposed to be above the basin rim to avoid potential drainage out the vent), but it may have to be satisfactory. Another option is to vent inside the 3/4" wall cavity with some creativity to a higher point before exiting the wall. The shower has a tub stopper, not a shower drain; that may work for preventing slosh back. Another option is a manual gate or ball valve in the drain line. A trap may not be necessary (except for potential odors from an incompletely draining grey water tank like mine). Also, when we use the shower for one of those "long luxurious" soaks, it will be at a time when we have hookups, at least fresh water and very likely waste connection so a trap may well be needed.
At any rate, these are all subjects for future posts. This is gonna be fun :)
