Hello, I am building a metal building with a single 3 piece bathroom and a utility sink. I have gotten all the permits and now just need to do the work. The dirt work is done and gravel is being delivered tomorrow for the base. The building will be on a 4 inch slab. I have tried to get plumbers but they are all 3-4 months out for something like this. I decided to do it myself. I have read a lot of forums and roughly laid out my plan. Can someone tell me if this would pass an inspection on cursory glance. Obviously everything would have to be primed and glued, berriedand what not but is the plan solid? I added a photo of my rough job. The pipe would be vertical.