This 15 in round, epoxy-coated cast iron, high volume roof drain features a flashing clamp with integral gravel stop, a self-locking ductile iron dome, a 3 in no hub outlet, 137 sq-in 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.