Which plumbing system is designed to carry away waste?

The drainage system is specifically designed to transport waste away from fixtures, appliances, and other plumbing installations to a treatment location or sewer. This system is crucial for maintaining hygiene and preventing the buildup of waste in buildings, which can lead to health hazards and unpleasant conditions.

The drainage system typically includes pipes, traps, and fittings that work together to ensure that wastewater flows efficiently and that gases, such as sewer gases, are vented properly to the outside atmosphere. Components of this system may include wastewater pipes that gather sewage and greywater from various points and direct it to municipal sewers or septic systems.

In contrast, the supply system is responsible for delivering fresh water to fixtures and appliances, while the distribution system focuses on the movement of water within the building to ensure adequate supply to various points of use. The vent system, on the other hand, facilitates the proper functioning of both drainage and water supply systems by allowing air flow to prevent vacuum conditions and ensuring that wastewater can flow smoothly through the pipes.

Thus, when considering the primary function of each system, the drainage system is clearly the one designed specifically to carry away waste.