: : I have a 2" line coming from my shower that I am tying my tub into. Can I vent the tub approx. 1 foot before the tub tie-in or do I have to vent after the tie-in?

: : Thanks for your advice.

: Reply:
: Make sure AAV's are permitted by code in your area.
: If you're going to tie-in an 1-1/2" bathub drain into a 2" shower drain, the 1-1/2" vent tee for the bathtub should be as close to the bathtub drain trap as possible.
: Good Luck. e-plumber