

Each type of pipe fitting has a different use. Fittings that terminate or extend pipe runs are couplings, adapters, unions, caps and plugs. Fittings used to change a pipe's direction are elbows. Fittings that connect two or more pipes are tees, crosses, side-inlet elbows and wyes. Fittings used to change pipe size are reducers, bushings, couplings, fitting reducers and adapters.
Pipe fitting are available in a variety of materials that are all ideal for certain situations. Some common materials used in the manufacturing of pipe fitting include aluminum, cast iron, steel, brass, copper and plastic. Each material has advantages and disadvantages.
There are several benefits to each material used to make pipe fittings. Aluminum pipe fittings are lightweight and quite resistant to corrosion. Copper pipe fittings are also known for their non-corrosive qualities. Cast iron pipe fittings are highly resistant to abrasion. Steel and brass pipe fittings are sometimes used for their strength and durability. Plastic pipe fittings are most widely used for their low-cost durability and ease of installation.