Question fundamentally has to do with combining separate vent lines in the attic and through the roof.
Situation: Doing a remodel, Old bathroom had a toilet and shower sharing a 2" vent through the attic and out the roof. There is a separate 1 1/2 inch vent going through the roof for the single vanity sink.
With the remodel, I'm moving toilet, shower, and adding a vanity. So I'll have four separate vents moving through walls into the attic--a 2" toilet vent, a 1 1/2" vent for shower, and two 1 1/2" vents for the two separate vanities.
Question--can all of these work on current vents through roof? Easiest would appear to be to combine the toilet and shower vents in the attic to the 2" exit through the roof, and combine the two vanity 1 1/2" vents to exit the 1 1/2" vent through the roof. If not, what needs to be enlarged.
Question #2. Shower vent will need to come off 2 " drain raising at a 45 degree angle until I hit a wall and go strait up. What is the proper fitting to go off at a 45 degree vertical angle. (And in what direction is it to be oriented?)
Thanks a lot.