Counting Plumbing Fixtures for each pipe (Upgrade)

[JustinStirling]

This is great timing, because I think it has very good potential for helping me with the following issue:

@JustinStirling

In a drainage system, pipe cannot reduce size in the direction of flow (code requirement). So, I’m trying to come up with a method that will check the sizes of all upstream pipes to make sure any particular pipe segment isn’t smaller than any segment upstream (or prior) to it.