Doing a kithcen and bath remodel and have removed all the cast but have left the 4" cast vent line up to the roof, it's in the bathroom wall directly above the 4" pvc shown. This is a small 2 story with all plumbing on the first floor. The vents for the lav, kitchen sink and shower are already roughed in the walls. Down here in the basement I have run most of the hot and cold type L copper but have yet to tie in. Still using the old hanging stuff for the next couple of days. Anyway I need some advise as to what fittings I should use on the 4" stack. It's a tight space of about 4.5' In this space I need to tie in the toilet which will be about 12" to the right, 2" line from the lav and tub which will run above that sink on the right, 2" from kitchen sink to the left and would like to plumb in the washer and pump outlet from the basement sink. The legnth of 4" pvc is not glued and just their for the washer. Need to do this asap cuz bathing it up in the motorhome is getting old and it's getting cold!