Rhode Island Journeyman Plumber Practice Exam

A fixture's tailpiece is primarily used for what purpose?

1. Connecting the fixture to the trap

2. Offering support

3. Creating an air gap

4. Enhancing aesthetics

The correct answer is: Connecting the fixture to the trap

The tailpiece of a plumbing fixture serves the primary function of connecting the fixture to the trap under the sink or basin. It is a vertical section of pipe that extends from the bottom of the fixture and directs wastewater into the trap, which is an essential component for preventing sewer gases from entering the living space. Its design allows for proper drainage, ensuring that water flows smoothly from the fixture into the drainage system. In many cases, it operates as a transitional piece that facilitates a secure connection between the fixture and the trap, which is vital for maintaining the plumbing system's integrity and function. While other aspects such as offering support and enhancing aesthetics might be relevant in specific contexts, they are not the primary functions of a tailpiece. The importance of the tailpiece in ensuring effective waste management and protecting indoor air quality particularly highlights why its primary role is to connect the fixture to the trap.