Which item is typically used to join two sections of plumbing pipe together securely?

The correct choice, coupling, refers to a fitting used in plumbing to connect two sections of pipe together securely. Couplings are designed to provide a tight seal, ensuring that the flow of water or other fluids is uninterrupted. They can be made from various materials, including PVC, copper, and steel, to suit different types of plumbing systems. Couplings also come in various designs, such as straight couplings for connecting pipes of the same diameter or reducing couplings for joining pipes of different diameters.

Understanding what a coupling does is essential for anyone involved in plumbing, as it is a fundamental component often used in various installations and repairs. Choosing the appropriate coupling type and size is critical to maintaining the integrity and functionality of the plumbing system.

Other options, while also related to plumbing, serve different purposes. An elbow is used to change the direction of pipe runs, a nipple is a short piece of pipe with threads on both ends for connecting two other fittings, and a union allows for quick disconnection of pipes for service or replacement. These components don’t provide the straightforward function of joining two sections of pipe together as a coupling does.