Three-way connectors are used for pipe fittings and pipe connections. Also known as three-way pipe fittings or three-way fittings, three-way joints, they are used where the main pipeline needs to branch off.

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