What term describes a device that receives discharge from indirect waste pipes?

The term that describes a device receiving discharge from indirect waste pipes is known as a receptor. In plumbing terminology, a receptor is designed to accept and contain waste from indirect waste pipes, which typically discharge waste indirectly into a drainage system, often for safety and sanitation reasons.

Receptors come in many forms, such as sinks, floor drains, or special fixtures designed to handle specific types of waste, ensuring that they are safely channeled away without risk of contamination or backflow. This is essential in maintaining the overall integrity of the plumbing system and ensuring compliance with health and safety regulations.

The other options do not accurately define a device that handles discharge from indirect waste pipes. A discharge valve refers to a mechanism that controls flow but does not specifically describe a receptacle for waste. A drainage trap refers to a plumbing device that holds water to prevent sewage gases from entering a building but does not receive waste directly. An indirect waste outlet refers to the point at which the waste exits into the drainage system but does not serve as a receptacle for that waste. Thus, receptor is the most appropriate and precise term.