Which type of fitting connects pipes at a 90-degree angle?

The type of fitting that connects pipes at a 90-degree angle is known as an elbow fitting. This fitting is specifically designed to redirect the flow of fluids through a change in direction, making it essential for routing plumbing lines in corners or turns. Elbow fittings come in various angles, with the most common being the 90-degree elbow, which allows for a sharp turn in piping systems.

Understanding the function of an elbow fitting is critical for achieving efficient plumbing installations, as improperly routing pipes can lead to flow issues or increase the potential for leaks. This fitting is commonly used in both residential and commercial plumbing systems, promoting a more organized layout while ensuring that water or sewage can travel through the bends without obstruction.

In contrast, other fitting types serve different purposes. A straight fitting connects pipes in a straight line, while a reducing fitting is used to connect pipes of different diameters, and a coupling fitting typically connects two pipes of the same diameter in a straight run. Each of these has its unique application, but for connecting pipes specifically at a 90-degree angle, the elbow fitting is the appropriate choice.