Three-way connectors, also known as pipe fittings three-way or three-way pipe fittings, and three-way joints, are primarily used to alter the direction of fluids and are installed at the branching points of main pipelines. They can be categorized by pipe diameter. Typically made from materials such as carbon steel, cast steel, alloy steel, stainless steel, copper, aluminum alloy, plastic, polyvinyl chloride (PVC), etc.