Specification - R1200-JD-STR - Large Sump Roof Drain with Extension Hardware and Sump Pan Designed for New and Replacement Roofing MIFAB series R1200-JD-STR lacquered cast iron large sump 15in diameter roof drain with anchor flange, large cast iron waterproofing membrane clamp ring with four bolt pattern, integral gravel stop, and standard self-locking cast iron dome dome strainer with a free area of 103 square inches. W/A8-BP-STR lacquered 18 gauge sump pan 30" x 30" and HS-8 hardware.