re: Adding new sewer drain concrete slab house

By your drawing, it’s pretty straightforward. But the simplest way is still going to be cut the concrete as close to the wall as you can cut it. Bearing in mind, you’re only cutting a notch that’s 7”-8”s wide. Then you can hammer out and down through the concrete. But you do want to be several inches below ground when you breakout of the slab. That way you avoid exposing the pipe when you backfill on the exterior.