Which component is typically responsible for carrying wastewater away from fixtures?

The component responsible for carrying wastewater away from fixtures is the drain pipe. In plumbing systems, drain pipes are designed to remove waste and used water, directing it toward the sewer system or septic tank. These pipes are usually positioned at a downward slope to assist with gravity drainage, making them efficient for eliminating wastewater swiftly from sinks, toilets, showers, and other fixtures.

The vent pipe, on the other hand, serves a different function by allowing air to enter the plumbing system, ensuring that waste can flow freely and preventing vacuum formation within the drain lines. It does not carry wastewater. The supply line is responsible for delivering fresh water to fixtures, which is also not related to wastewater removal. Finally, the overflow pipe typically prevents excess water from spilling out of fixtures, directing it away safely in the case of overflow situations, but does not play a role in the standard drainage of wastewater.