A device that receives water from a water supply line and/or discharges waste water into a connected drainage system is called a?

In plumbing terminology, a fixture is defined as a device that connects to a water supply line and/or discharges waste water into a drainage system. Fixtures include a variety of common plumbing elements such as sinks, toilets, bathtubs, and faucets. Their primary function is to facilitate the use of water in various ways—either for consumption, washing, or waste disposal.

A fitting refers to a component that joins sections of piping together but does not directly receive or discharge water. A connector functions similarly but is typically used for specific types of tubing or hose connections and may not always relate to plumbing fixtures. A drain is a part of the plumbing system that carries wastewater away but does not directly connect to a water supply or provide a means for the use of water. Therefore, the term fixture accurately encompasses the definition of a device used to both receive water and discharge wastewater, making it the correct answer in this context.