Which section covers the installation and maintenance of sanitary drainage systems?

The correct choice focuses on Section 3, which specifically addresses the installation and maintenance of sanitary drainage systems. This section outlines the requirements and best practices necessary for effectively managing wastewater and ensuring that drainage systems function properly. It includes critical information regarding the materials to be used, sizing, layout considerations, and compliance with health and safety regulations.

Sanitary drainage systems are essential in preventing contamination and ensuring that wastewater is transported safely away from buildings. This section provides the guidelines that plumbing professionals need to follow to ensure that installations meet national standards, thereby safeguarding public health and protecting the environment.

The other sections mentioned do not pertain directly to the installation and maintenance of sanitary drainage systems. Section 2 focuses on water supply systems, including their design and functioning. Section 4 discusses plumbing venting, which is necessary for the proper operation of drainage systems but is distinct from the drainage systems themselves. Section 6 deals with water treatment processes. As such, these sections serve different areas of plumbing code and do not provide the specific guidance related to sanitary drainage systems that Section 3 does.