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I started to rough-in my laundry drain box, not thinking to check the 2018 IRC. I was using information that I had from 14+ years ago (see attached). Based on my p-trap at 12" above the floor, at what elevation do I need to mount the bottom of the drain box? Based on 2018 IRC, it would seem I...

My county uses the 2018 IPC. I am in the process of installing underslab DWV and a have a few questions: My trunk line is fairly deep to accommodate the kitchen sink which is 50+ feet on the other side of the house. I am planning to run all of my fixture drain lines and vents at a more...