Recent content by WN1

So the two typical ways to plumb under a toilet to a 3" drain pipe is: A: 4" vertical pipe to 4x3 closet bend (restriction in theory from 4" to 3", but gives more space in flange opening) B: 3" vertical pipe to 3" long sweep elbow (less space in flange opening, but no restriction afterwards)...

Sorry, my diagram wasn't clear with slopes. For the blue dry vent, the section below the 42" vertical section is actually at 45 degrees. The horizontal section is 6" above flood level (i.e. 42" height). Revised diagram:

Thanks in advance for giving advice. Long time lurker, but I haven't been able to see this issue addressed previously. Short version: for a toilet, would a 2" wet vent (shower drain) connected to a 1.5" dry vent (shower vent) be okay? 1. Current tub has a 1.5" drainpipe, 1.5" dry vent, and...