I am trying to figure out if my situation applys here. I have a shower drain and a kitchen sink i am trying to drain and vent. because of the angle of the horazontal waste line in the basement beneath the shower, i would like to 90 bend up, with a double Tee on top of that, right branch going strait to the 2" shower p-trap, left branch going to pick up the kitchen sink (the sink is re-vented above the high water level of the fixture, the shower is not), the top of the double Tee, being the vent, goes up through the floor, between the shower and the sink (in the back of a closet) and then has a clean out wye accessable.
I want to use a double Tee because the space is so tight (the sink and the shower drains are about 4 feet apart). I already called my inspector and asked about useing a double san-tee, he said no go, unless the shower was somehow re-vented also. I am now wondering if a double fixture fitting would be alright in this situation. If it is not (or even if it is) then could some one please help me understand in what situations these three fittings are to be used? BTW I am in minneapolis so the inspector is very thorough.
PS. My name is Jampel, and thank you to Terry and all the people on this site, i have read and benifited from many threads here but this is my first post.