Malleable iron fittings are lighter fittings in 150# and 300# pressure class. They are made for light industrial and plumbing use up to 300 psi.
Malleable fittings include elbows, tees, couplings and floor flange etc. Floor flange is very popular to anchor items to the ground.
Black iron pipes can be used for gas under your home, in the crawl space or basement, inside the walls, or in the attic – basically where it is not exposed to earth or the elements (moisture). This is because of the lack of anti-corrosive coating.
