The American Society of Plumbing Engineers (ASPE) just made your life a whole lot easier. They have cut the time it takes to draw a DWV riser diagram by 80 percent. That's correct! It will only take you 20 percent (at most) of the usual time to prepare a riser diagram.
Case in point, our office tested a commercial project. It took 45 minutes to draw the riser diagram for a particular building on AutoCAD without the program. When we used the ASPE program, the same drawing took seven minutes. Not bad for saving time!