What is a common term for devices such as sinks, lavatories, toilets, or shower stalls?

The term "fixtures" is commonly used to refer to devices like sinks, lavatories, toilets, or shower stalls because these items are permanently affixed to a structure and are essential for plumbing and sanitation in buildings. Fixtures are integral parts of the facilities that provide necessary services, making them crucial to the functionality of washrooms and kitchens. In the context of maintenance and facility management, recognizing fixtures is essential for understanding plumbing repair, installation, and general upkeep.

While "components" could refer broadly to parts of a system, it does not specifically indicate the installed nature of plumbing devices. "Apparatus" generally refers to a complex structure or mechanism and could imply a broader array of devices beyond just those affixed to a building. "Appurtenances" typically denote additional items or accessories that enhance the main feature but are not the primary elements themselves. Thus, fixtures is the most accurate term in this context as it clearly identifies the specific, fixed installations within a building's plumbing system.