I have a bathroom group that has a toilet, single lavatory, and combo tub shower. The shower drain is less than 5 feet from the lav. I am planning on running the shower and lav with a 2 inch drain and the toilet will be a three inch line. The lav will have a two inch vent running through the roof. My question is how to run the wet vent. The 3 inch main waste pipe will run directly below the bathroom group in the crawl space, horizontally. The bathroom will be the first drains hooked into the line. So, does the lav wye in first then the tub/shower, then the toilet? After that will be the 2 inch washer drain, then the softener drain, then the kitchen sink (it has an AAV) then the 3 inch connects to the 4 inch pipe that goes to the grinder. I was thinking that the washer drain should be downstream of the bathroom. Just wondering if this is right.
Shelly
Shelly