4 in No-Hub Overflow Roof Drain with Dome

SPECIAL ORDER ITEM. Review Returns Policy before purchase. Engineered for commercial and industrial roofing, this overflow roof drain assembly facilitates effective water management on flat roof surfaces. The unit includes a heavy-duty body, a protective dome designed to prevent debris from entering the drainage system, and a secure collar for installation. This component is ASME- certified and compliant with UPC- and IPC- standards, ensuring it meets rigorous plumbing code requirements for drainage infrastructure and water level control in large-scale building applications.