Hi, I'd like to double check how my venting is for two fixtures. Please see the attached diagram for how I planned on the draining/venting of these two units. I was mainly wondering if I can use the 2" stack for these units as the vent, or if i have to have an additional vent before the p-trap enters the 2" stack? These are the only 2 fixtures on this branch. They connect to a 4" in the basement which also has 2 bathrooms coming into it as well (they have their own venting)