Please see attached jpg. This is my plumbing layout for my new bathroom, anybody see anything wrong with it? My one concern was the vent from the vanity. I am running around the bathroom? is this acceptable? there is a 2" that vents through the roof, this is where I am going to tie in all the 1.5 vents at 48" aff. The attic has 24" of new insulation, I didn't want to go up there and disturb it just to tie in a vent, but will if I have to. I am in Ontario.
I can't speak for the codes in your area, but when i renished my basement in Minnesota, I ran my vents horizontally a lot further than that. Just make sure that the vanity vent slopes unpward to where it ties in with the rest so that any moisture or condensation will run back to the vanity drain.