15 in Primary Roof Drain

SPECIAL ORDER ITEM. Review Returns Policy before purchase. Engineered for primary drainage applications, this roof drain features a robust cast iron body with a protective coating to resist corrosion. The assembly includes a combination membrane flashing clamp and gravel guard to secure roofing materials while preventing debris from entering the drainage system. A low silhouette poly-dome is included to facilitate water flow while maintaining a compact profile on the roof surface. This unit is ASME-, UPC-, and IPC- compliant, ensuring it meets rigorous industry standards for plumbing installations and water management performance in commercial or industrial roofing projects.