What does "drainage" refer to in plumbing terms?

In plumbing terms, "drainage" specifically refers to the removal of wastewater and stormwater through pipes. This process is vital for maintaining sanitary conditions in buildings and preventing flooding. It involves the design and implementation of systems that manage the flow of used water from various sources, such as sinks, toilets, and floor drains, directing it away from living areas and into treatment facilities or appropriate disposal locations.

Understanding drainage is essential for plumbers as it encompasses the entire network of pipes, traps, and other components that facilitate the safe and efficient transportation of wastewater. In contrast, the other options relate to different aspects of plumbing; for example, the delivery of clean water pertains to the supply system, repairing leaks focuses on maintenance, and the installation of plumbing fixtures addresses the physical setup of devices that utilize water. These distinctions highlight the specific role that drainage plays in the broader field of plumbing.