4 in Adjustable Roof Drain with Standpipe

SPECIAL ORDER ITEM. Review Returns Policy before purchase. Engineered for commercial drainage, this primary roof drain features a heavy-duty cast iron body designed to withstand demanding environmental conditions. The assembly includes a combination membrane flashing clamp and gravel guard to ensure a secure, watertight seal at the roof surface. A low silhouette dome manages water flow while effectively preventing debris from entering the drainage system. This professional-grade component is ASME- certified and UPC- and IPC- compliant, meeting the rigorous safety and performance standards required for complex building projects and flat or low-slope roof applications.