BLACK MALLEABLE IRON PIPE THREADED FITTINGS PLUMBING
Black fittings (black malleable iron fittings) are used to make connections to black iron pipe. Black iron pipe is used to transport natural and propane gas from the street or a tank to the home. Black iron pipe is also a popular choice in fire sprinkler systems due to its high heat resistance and for water supply lines due to its resistance to water damage. These fittings derive their name from the black oxide scale covering their surface.