Roof drainage is one of the fundamental considerations of building design.

There have been various methods devised for the sizing of water hammer arresters, creating confusion regarding the proper method to use.

The intent in designing and installing sanitary drainage systems is to ensure they will function reliably, are neither undersized nor oversized, and are constructed from materials, fittings and connections whose quality is regulated by codes and standards.

Running a small engineering firm means competing with bigger firms for the same projects.