What is the correct terminology for a plumbing fixture intended to connect to a drainage system?

The term "drainage fixture" is used to refer to a plumbing fixture that is specifically designed to connect to a drainage system. This terminology is aligned with the standards of plumbing codes which define the functionality of fixtures as they relate to the safe and sanitary removal of waste and wastewater.

Drainage fixtures are crucial components in plumbing systems because they facilitate the movement of liquid waste into the drainage system, ensuring that it is directed away from living spaces and treated properly.

While terms like "waste fixture" and "soil fixture" may also refer to fixtures involved in waste management, they are typically used in more specific contexts that may not encompass all types of drainage functions. "Collector fixture," on the other hand, usually refers to a fixture that collects waste but does not inherently define the connection to the drainage system as broadly as "drainage fixture" does.