I am installing a new lavatory in proximity to a toilet 2" vent pipe. Is it okay to tie the lavatory drain to the toilet vent pipe?

I am installing a new lavatory in close proximity to a toilet 2" vent pipe. Is it okay to tie the lavatory drain to the toilet vent pipe?


If there's nothing connected to the 2" vent above where you're teeing off to pick up the lavatory the answer is, yes you may.
Cut in a 2X2X1 1/2" drainage tee 17 1/2" off the floor to center of the tees branch. You can arm off the tee and stub out 1 1/2" to the trap. Good luck. Tom