MIFAB® R1200-BUV Series lacquered cast iron deep sump roof drain with 15” diameter anchor flange, sump receiver, gasketed fixed extension (specify height-2”, 3” or 4”- V2,-V3 or -V4), underdeck clamp, cast iron waterproofing membrane clamp ring with integral gravel stop, and standard self-locking polyethylene dome strainer with a free area of 125 square inches.