My design is based on a few things:
1. I believe I need a cleanout at the end of the in-ground line, so I'm putting a 3" cleanout inside a small closet that will enclose the exisiting floor drain. The floors already slope to the drain, so I figured I should put the clean out in there also, to make it easier/cleaner when/if the cleanout needs to be used. Would it be better or is it required to have this cleanout inside the bathroom?
2. I believe the bar sink would have to be the last fixture on the in-ground branch (closest to the stack), but the tub is going to be very close there, so my thought is to run a separate drain for the bar sink above grade through the new wall, and have it join the main stack with a san-t above the floor. Is that acceptable? Would it be better to have a second in-ground branch drain line to serve the bar sink by itself?
3. I believe I can have both the bathroom lav and the bar sink share a vent connection above their drains, allowing the lav drain to serve as a wet vent for the toilet and tub, is this correct? This line will run between the floor joists, then 90 up next to the stack and tie into an existing 1 1/2" 90. There is an existing 1 1/2" vent connection into the stack in the wall above, and while I think 2" would be ideal, I belive 1 1/2" is acceptable for the fixture units below. Is that right?
4. The full length of 3" pipe run is 9', if that is useful information.