02401 Business Math for Plumbers  Provides an overview of the drain, waste, and vent (DWV) system from inside the building, where the liquid drains into pipes, to the sewer and waste treatment facilities. Covers the basics of traps, drains, vents, DWV fittings, and cleanouts.

02402 Sizing DWV and Storm Systems  Provides an overview of the water distribution system from its source—a municipal water system or a private well—to water treatment and distribution. Also covers the water distribution system within buildings as well as the basics of valves, fixtures, and faucets.

02403 Private Water Supply Systems  

02404-02 Private Waste Disposal Systems  Describes the types of private sewage systems, discusses the maintenance and replacement of these systems, and explains how to determine the local code requirements for these systems. Covers percolation tests and sewage system planning and layout.