21500 Series coated cast iron Roof Drain, large polypropylene locking dome, WEJLOC non-puncturing clamp ring with integral gravel stop, large sump with wide roof flange and bottom outlet.
Used on roofs of any size and any type of construction. Large slotted dome provides maximum free area for quick drainage of rainwater and protects the sump and connected pipe from debris. WEJLOC compression flashing clamp holds the membrane or flashing securely to the drain body. Include -16 internal water guard option for overflow drain applications.