This 15 inch round, epoxy-coated cast iron, high volume roof drain features a flashing clamp with integral gravel stop, a self-locking ductile iron dome, an 10 inch no hub outlet, 137 square inch free area and can be purchased BAA compliant. Galvanized body, flow restrictor, sump receiver, underdeck clamp, deck flange with adjustable extension, and various dome materials are among other options available.