Bsperr
Member
We remodeled our master bath a while back and I'm working on the guest bath now. When we did our master bath, I didn't realize that the vanities in the two bathrooms would end up back-to-back, or else I might have done it differently. In the picture, you can see the back side of the master bath vanity rough in. I'm pretty sure I can't just extend the trap arm for the master bath with a combo wye and add a new trap arm for the guest bath (unless one of the experts says otherwise). Does the way I have it drawn on the picture look like the best way to install the new DWV for the guest bath vanity or is there a better way?