You can only size sanitary systems whose system type is Waste. For example, if you create system definitions for sanitary black water and sanitary gray water, you must define the system type as Waste. Otherwise, you cannot size the systems. For information on creating system definitions, see Configuring Plumbing System Definitions.
When you size a sanitary system, you can base the plumbing line sizing on 1 of 4 main types of runs:
The type of run that you specify determines the sizing method that the software uses.