15 in Cast Iron Primary Roof Drain

SPECIAL ORDER ITEM. Review Returns Policy before purchase. Engineered for primary roof drainage, this unit features a robust cast iron body with a protective coating to resist corrosion in demanding rooftop environments. 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 integrated to facilitate water flow while maintaining a compact profile. This drain is ASME-, UPC-, and IPC-compliant, ensuring it meets rigorous plumbing standards for commercial and industrial roof applications.