Nipples

A nipple is a short piece of pipe with male pipe threads at both ends. It is used to connect two female threaded pipes or fittings. The length of the nipple is specified by the overall length including the threads. A "close nipple" has no unthreaded area and is virtually unexposed when connected to two female fittings.

Brass Nipple

Brass nipples are best known for their incredible strength and excellent ductility in high temperatures. Brass nipples are

commonly used in plumbing applications because they are best suited to hot-water distribution lines. However, they are not quite as ductile in colder temperatures. They have good conductivity and a low magnetic permeability.

Brass has a longer lifespan than many alternative metals, such as steel. It offers great corrosion resistance from salt water, acids, minerals, and peaty soils contained in water. Brass is a soft metal that is easy to install and creates a tight seal. It offers many of the same advantages of copper, but provides a heavier wall.

Black Nipples

Black nipples are manufactured of steel. They are commonly used for outdoor and industrial applications with the

exception of underground lines. These nipples work best with cold water lines, but are suitable for hot water lines as well. The main advantages of using black nipples is their superior resistance to water damage and high heat resistance when compared to galvanized and copper nipples. 

Galvanized Nipples

Galvanized nipples are made from zinc-coated steel. They are commonly used for outdoor and industrial applications.

They may be used in most applications with the exception of underground lines. These nipples work best with cold water lines, but are suitable for hot water lines as well. The main advantage of using galvanized nipples is their superior rust resistance when compared to black and copper nipples.