What is the function of a pipe tee?

A pipe tee is a plumbing fitting characterized by its T-shape, enabling it to connect three sections of pipe together. Its primary function is to create a branch in a piping system, allowing for the merging or splitting of fluid flow at a 90-degree angle. This capability is crucial in plumbing and piping installations because it facilitates the redirection of fluid from a main line to a secondary line without compromising the system's integrity.

While increasing pipe length and closing the end of a pipe are functionalities associated with other types of fittings, they are not the primary role of a pipe tee. Similarly, compressing piston rings is unrelated to the functions of piping fittings and is specific to engine mechanics. Thus, the answer highlighting the creation of a 90-degree joint accurately reflects the essential role of a pipe tee in both residential and industrial piping applications.