I learned a few things about the plumbing plan.  I used to think that pipe lines were laid in the walls, but they go under the floor.  The sewer line is also bigger than I previously thought it was.  I had no idea that the gas line went in the plumbing plan.  I found out that the sizing of every pipe is annoying to do, and there were fewer valves than I thought.  This layout should not effect the home model.