What is a plumbing appurtenance for example is a dishwasher or a refrigerator a plumbing appurtenance or do these appliances contain plumbing appurtenances within their systems?

A Plumbing appurtenance refers to a device or accessory that is part of a plumbing system, contributing to its function, such as valves, faucets, or drains. While a dishwasher or refrigerator may not be classified as plumbing appurtenances themselves, they do contain plumbing appurtenances within their systems, such as water inlets and drainage connections. These components help facilitate the flow of water and waste, integrating the appliances into the overall plumbing network.