What is the part of the drainage system that conveys discharge from the end of the building drain to a disposal point called?

The part of the drainage system that conveys discharge from the end of the building drain to a disposal point is called the building sewer. This system is crucial because it connects the plumbing distribution of a building to the municipal sewer system or a private disposal system, such as a septic tank.

The building sewer is typically situated outside the building's foundation and serves as the main pathway for wastewater to exit. This ensures that hygiene standards are maintained, and prevents the waste from polluting the surrounding environment. Understanding the function of the building sewer is essential for anyone involved in plumbing, as it plays a critical role in waste management and public health.

Other components mentioned, such as the building vent, building drain, and building outlet, serve different purposes within the plumbing system but do not specifically refer to the section that carries wastewater out of the building. The building vent is responsible for allowing air into the drainage system to facilitate proper drainage and prevent siphoning, while the building drain refers to the interior pipes that move wastewater from individual fixtures to the building sewer. The term building outlet is not commonly used in plumbing codes or standards in this context.