What are the two main categories of plumbing systems addressed in the code?

The National Plumbing Code of Canada primarily categorizes plumbing systems into two main types: drainage systems and water supply systems.

Drainage systems are responsible for the removal of waste and wastewater from buildings. They ensure that harmful materials are safely transported away from living spaces, preventing contamination and health hazards. A well-designed drainage system is critical for maintaining sanitation within any structure.

Water supply systems, on the other hand, are tasked with delivering clean and safe water for various uses within a building, such as drinking, cooking, bathing, and sanitation. These systems include elements like pipes, fixtures, and valves that must adhere to strict standards to guarantee water quality and availability.

The other options do mention related systems, but they either combine unrelated categories or focus on specifics that do not align with the primary divisions outlined within the code. Heating and cooling systems, while related to building management, do not fall under the plumbing code's main focus. Similarly, irrigation systems and wastewater reclamation, although important, are not classified as the main plumbing categories addressed.