What is the purpose of an interceptor in a plumbing system?

The purpose of an interceptor in a plumbing system is primarily to separate deleterious matter from normal waste. This device plays a critical role in maintaining the quality of wastewater before it enters the public sewer system or treatment facilities. Interceptors, such as grease traps or oil-water separators, are specifically designed to capture and contain substances that could be harmful to the sewage system, such as fats, oils, grease, and sediments. By removing these contaminants, interceptors help to prevent clogs and backups in the plumbing system, protect the environment, and ensure compliance with health and safety regulations.

Other options, although they pertain to plumbing or public utilities, do not accurately describe the function of an interceptor in a plumbing system. For instance, conveying stormwater or supplying water for public use are unrelated to the interceptor's role in treating and managing wastewater. A public comfort station's function is to provide restroom facilities rather than dealing directly with waste separation, which further distinguishes it from the purpose of an interceptor.