Three way fittings, also known as pipe fittings or three-way fittings, three-way joints, etc. Mainly used to change the direction of fluid, used at the branching point of the main pipeline. It can be classified according to the size of the pipe diameter. Generally, it is made of materials such as carbon steel, cast steel, alloy steel, stainless steel, copper, aluminum alloy, plastic, argon slag, PVC, etc.