Three-way connectors are pipe fittings used for pipe connections. Also known as pipe fitting three-way or three-way pipe fitting, three-way joints, used at the point where the main pipeline branches off.

A three-way fitting is a type of piping component with one inlet and two outlets; or two inlets and one outlet. It comes in T and Y shapes, with both equal and unequal diameter pipe openings, and is used at junctions where three pipes, either identical or different, converge. The primary function of a three-way fitting is to alter the direction of the fluid flow.