A1-C1 Home » Products » Specification Drainage Products » Parts » A1-C1 8″ diameter lacquered cast iron membrane clamp. Weepholes included on underside to drain water. Specification Sheet Catalog Catalog List Pricing Current Catalog: MPB-2024 Downloads Downloads Features & Benefits Typical Installations Outlet Selection Guide All Star Cover Flyer Drain Specifications Videos Videos Top Set Drain Demonstration All-Star Drain Video Return to Products