How is "plumbing fixture" defined in plumbing systems?

A "plumbing fixture" is defined as a device that provides a water supply or drainage. This encompasses various components used in plumbing systems that facilitate the delivery of water and the removal of wastewater in residential and commercial buildings. Fixtures include sinks, toilets, bathtubs, and faucets, which directly interact with users and are essential for the plumbing system's functionality.

The definition emphasizes that plumbing fixtures serve a specific role in regulating water flow and handling drainage, making them integral parts of sanitation and water management systems. They are designed to connect to the plumbing infrastructure, ensuring effective usage and efficiency.

Other options presented—such as a system that stores water for later use, a type of pipe used for drainage, and a tool used for fixing plumbing issues—describe other aspects of plumbing but do not accurately reflect the specific function of a plumbing fixture. These options instead refer to storage tanks, pipes, and tools, which play different roles in the plumbing trade.