Deep Sump Heavy Downpour Roof Drain and Low Profile Dome

Designed to drain unusually heavy rains from flat roofs of any construction, this 16" (406) diam., Duco coated cast iron drain has a 11" (275) deep, 12" (305) diam. sump that allows entrapped air, which would stop water from entering the drain pipe/leader, to escape. Its combined gravel stop and flashing collar grips roofing membranes for a leakproof seal without puncturing. The drain is protected from debris by a low profile polyethylene dome.