4" Black Iron Coupling

4" Black Iron Coupling. This Malleable Black Fitting is specifically designed to hold two lengths of pipes, nipples, or different pipe parts together and direct the movement of the gas or liquid depending on application. This fitting is equipped with standard iron pipe threads, and a grooved end that allows the pipe to enter the fitting with ease. This BLKCUP4 4" Black Iron Coupling is designed to be used in a wide variety of applications including air, water, gas, and oil. This Fitting offers you quality, and delivers top value in commercial and residential applications. When installing the BLKCUP4 4" Black Iron Coupling, be sure to apply teflon tape and pipe dope (liquid sealant) to seal threaded joints, for a seal that will protect the building and jobsite from future leaks. Fitting is pressure tested before leaving the factory.