What does the term "drainage" refer to in plumbing?

The term "drainage" in plumbing specifically refers to the removal of wastewater via pipes. This involves the system that carries unwanted water, such as that from sinks, toilets, and showers, away from the buildings to the sewer system or a treatment facility. Proper drainage systems are critical for maintaining sanitary conditions and preventing the buildup of water, which can lead to structural damage and health hazards.

Disposing of solid waste, while an important aspect of plumbing, relates more directly to waste management rather than drainage specifically. The collection of rainwater pertains to water harvesting systems, which are separate from standard drainage systems designed to handle wastewater. The filtration of potable water focuses on making water safe for drinking, which is not connected to the concept of drainage. Understanding these distinctions is key in plumbing to ensure effective system design and functionality.