I am in need of assistance. Looking for details on how to 'rough-in' my new garage for a bathroom. Have poured the footing and walls (below frost line). Have a 4" PVC installed in the wall for the waste line out. I have a design I would like to rough-in. Includes a toilet, shower, sink, (possibly a urinal for da' boys! ). I am looking for pictures and details on what size PVC to run... basically I need to know how. Any assistance is greatly appreciated.