Which of the following is true about plumbing fixtures?

Plumbing fixtures must adhere to specific plumbing codes to ensure safety, efficiency, and proper function within a plumbing system. These codes are established by local, state, or national regulatory bodies to standardize the construction and installation of plumbing systems. Compliance with plumbing codes is crucial as they cover aspects such as materials used, pressure ratings, drainage requirements, and sanitation standards. This adherence helps prevent plumbing issues, including leaks, clogs, and other hazards, protecting both the occupants and the integrity of the building.

The other statements do not accurately reflect the nature and requirements of plumbing fixtures. While fixtures are essential in various types of buildings, including commercial and industrial spaces, they are not exclusive to just residential settings. Additionally, plumbing fixtures are available in a wide range of sizes and shapes to accommodate different environments and needs, rather than being limited to standard dimensions. Lastly, while fixtures can be made from a variety of materials, they must be suitable for plumbing use and comply with these established codes, which dictate acceptable materials based on their intended use and performance criteria.