In the middle of a bathroom remodel, and wondering the ideal way to route these drains. Ignore all the pvc below the bottom reducing fernco, it’s wrong and just temporarily there for during the renovation. There is a bathroom sink drain on the right in the photo, with a kitchen sink on opposite side of that wall. Both sinks share that 2in line in the wall. The cast iron vent goes straight up a few feet and thru the roof. The 2in line coming from under the floor on the right serves the batht...
