Roof DrainsCast Iron
Coated cast iron roof drainage for commercial buildings, including the large-sump Series 21500 and medium-sump Series 22010. Each features a non-puncturing clamp ring with integral gravel stop, multiple dome options, and Pre-Fab Base availability for faster installation.
Product Specifications
Key Features
Common Applications
Roof Drain FAQs
Common questions about Josam Roof Drains
Josam roof drains offer various dome options including beehive domes, flat domes, and other configurations to match project requirements and aesthetic preferences.
Yes, Josam roof drains are available with the Pre-Fab Base option for quick and secure installation, saving time and labor costs.
Josam roof drains feature a non-puncturing clamp ring with integral gravel stop, providing secure membrane clamping without damaging roofing materials.
Popular series include the 21500 (Large Sump) and 22010 (Medium Sump), with various outlet configurations and flange sizes available.
Where Commercial Roof Drains Are Specified
Related product types
- Detention systems — manage the roof runoff these drains collect.
- Catch basins — ground-level collection downstream of roof leaders.
Common applications
- Warehouses — large-sump drains for big roof areas.
- Schools & universities — clamp-ring roof drainage with gravel stops.
- Hospitals — reliable roof drainage for critical facilities.
Need Commercial Roof Drainage?
Josam roof drains provide reliable drainage for commercial and industrial roofing systems.