What is the primary purpose of a plumbing drainage system?

The primary purpose of a plumbing drainage system is to remove waste water and sewage from a building. This system is essential for maintaining hygiene and health in residential and commercial spaces. It facilitates the efficient disposal of waste products, preventing them from accumulating within the building and causing potential hazards such as mold growth, unpleasant odors, and health risks from untreated sewage.

The drainage system typically includes a network of pipes, fittings, and fixtures designed to transport waste away from toilets, sinks, showers, and other drainage points to a municipal sewage treatment facility or a private septic system. This function ensures that contaminants are safely carried away, protecting both the occupants of the building and the environment.

While supplying water to fixtures, circulating air, and storing rainwater are significant aspects of plumbing and building systems, they serve different purposes and do not relate to the fundamental function of waste removal, which is central to the drainage system's design and operation.