What type of fitting is used to combine three sections of pipe?

The fitting used to combine three sections of pipe is a tee. A tee is specifically designed with one inlet and two outlets, allowing it to create a junction where three pipes can meet. This is essential in various plumbing and piping systems where branching or splitting the flow of liquid or gas is required.

In contrast, an elbow fitting is used to change the direction of a pipe run by 90 or 45 degrees, making it important for creating bends in a piping system but not suitable for connecting three pipes. A coupling is used to join two sections of pipe end-to-end, providing a straight connection rather than a branching point. A reducer, on the other hand, is designed to connect pipes of different diameters, but it does not facilitate the joining of three sections. Thus, the tee is the only fitting that effectively meets the requirement of combining three sections of pipe into a single configuration.