Designed for installation flush with the surface of planting areas in green roof systems, this 12" diam. Duco coated cast iron drain is protected against debris by a perforated, stainless steel gravel stop. The gravel stop is topped by a removable perforated stainless steel dome that rises above the surface to collect drainage during heavy downpours and allows access for easy cleaning. It is fitted with a 20" diameter combination gravel stop and flashing clamp for leak free installation in roof decking.