Venting for bathroom plumbing Calling dr. lazypup!
Redoing a bathroom, need to run new drain and vent lines. In my layout, I have the 3" line coming up to the toilet, and 24" before the toilet a 3 x 3 x 2 wye comes off to go over to the shower. immediately after this wye is a 2 x 2 x 2 wye that goes straight up to the roof for a vent. the lav sink ties into this standpipe in the wall. The sink is ~ 40" from the standpipe and the shower is ~60". the standpipe and shower drains are all 2", the lav sink would be 1 1/2". Question is, is this configuration ok as designed, or does the venting need to be done differently? With this design I am minimizing drilling into floor joists, which run perpendicular to the toilet (so from sink to toilet). Any and all thoughts are greatly appreciated!