Which component connects a trap to the drain?

Which component connects a trap to the drain?

• A. A trap primer feeds water into traps.
• B. A wax ring seals the drain.
• C. A vent stack connects to the toilet.
• D. A trap adapter connects a trap to the drain.

Answer: (D)

Connecting a trap to the drain relies on a trap adapter. This fitting is designed specifically to join the trap’s outlet to the drainpipe, providing the right size and connection type for the trap and the pipe material. It creates a watertight seal and a smooth interior path, which helps prevent leaks and reduces the chance of clogs. Other components have different roles: a trap primer is used to keep trap seals from drying out by adding water to the trap, a wax ring seals the connection between a toilet and its flange, and a vent stack provides airflow to the drainage system to prevent siphoning. None of these connect the trap to the drain in the way a trap adapter does, which is why the trap adapter is the correct choice.

Connecting a trap to the drain relies on a trap adapter. This fitting is designed specifically to join the trap’s outlet to the drainpipe, providing the right size and connection type for the trap and the pipe material. It creates a watertight seal and a smooth interior path, which helps prevent leaks and reduces the chance of clogs.

Other components have different roles: a trap primer is used to keep trap seals from drying out by adding water to the trap, a wax ring seals the connection between a toilet and its flange, and a vent stack provides airflow to the drainage system to prevent siphoning. None of these connect the trap to the drain in the way a trap adapter does, which is why the trap adapter is the correct choice.