Which plumbing system is responsible for removing wastewater from buildings?

The drainage system is specifically designed for the removal of wastewater from buildings. This system includes all of the pipes, fixtures, and appliances that handle the wastewater generated by sinks, toilets, showers, and other wastewater-producing activities in a building. The main function of the drainage system is to carry this wastewater away from the property to appropriate treatment facilities or sewer systems.

The potable water system, in contrast, is responsible for supplying clean and safe drinking water to a building. It does not deal with wastewater. The sewage system typically refers to the larger municipal infrastructure that collects and treats wastewater from multiple properties, but it does not directly handle wastewater within the building itself. The ventilation system is concerned with the movement of air within the building, ensuring proper airflow and indoor air quality but has no direct role in wastewater removal.