Hello I have some questions on what's the best way to run the DWV in my basement. Here is a drawing of how id like the finished rooms to look like. I have a shower, toilet, sink. Floor drain in utility room and washer with sink in laundry. The black pipe is my sewer line as is. The flow is coming towards the bathroom.
So I was thinking of starting first with a 3" back flow piece. Then wye with a 3" coming out heading toward bathroom hitting toilet first. From there I was thinking shower? I'll get some pipes drawn in and go from there.