4 in Trench Drain with Overflow

SPECIAL ORDER ITEM. Review Returns Policy before purchase. Engineered for roof drainage systems, this unit features a robust cast iron body paired with a cast iron water dam to manage overflow effectively. The assembly includes an integrated flashing clamp and gravel stop to secure roofing membranes while preventing debris from entering the drainage line. A polyethylene dome provides a protective cover for the drain opening. This component is ASME- certified and meets UPC- and IPC- standards, ensuring compliance with plumbing codes for commercial and industrial roof applications.