What is the function of the 'Building Sewer' in plumbing?

The building sewer serves a vital role in plumbing by conveying waste from the building drain directly to the public sewer system or a private sewage disposal system. This section of the plumbing system is crucial because it ensures that waste materials, including sewage and greywater, are transported safely away from the building, preventing contamination and maintaining sanitation.

Understanding the context of this function involves recognizing that the building sewer is typically located below the ground and is a key component in the overall plumbing infrastructure. It connects with the building's main drain, which collects wastewater from various fixtures within the building. Once the building sewer transports the wastewater to the municipal sewer system or a private septic system, it ensures that waste is handled in a manner that protects public health and the environment.

Other options do not accurately describe the primary purpose of the building sewer. For instance, removing surface water pertains more to drainage systems rather than the functions of a building sewer. Connecting to other plumbing systems generally involves fixtures and piping inside the building, while accessing fixtures for cleaning refers to maintenance aspects, which are unrelated to the primary function of waste conveyance.