Metal deck roofing systems require specialized drainage solutions that account for deck design, structural loads, and weather exposure. The Zurn Z111 12" Diameter Roof Drain for Metal Decks provides reliable stormwater control while integrating seamlessly into metal deck assemblies. Its robust construction, watertight sealing, and dome design make it a trusted option for commercial, industrial, and institutional buildings.

Zurn Z111 Roof Drain Schematic

What Is the Zurn Z111?

The Z111 is a 12-inch diameter roof drain specifically designed for metal deck applications. Its configuration includes a wide drain bowl for efficient water collection and a flashing clamp for a watertight membrane interface. The drain’s durable dome prevents debris buildup while allowing consistent stormwater flow, ensuring the system performs during heavy rainfall events.

Key Features & Benefits

• 12" Diameter Bowl: Handles high-capacity stormwater runoff from large metal deck roofs.
• Designed for Metal Decks: Engineered to integrate seamlessly with metal deck construction systems.
• Low-Profile Dome: Ensures efficient water intake while minimizing clogging risks.
• Durable Build: Made with materials that resist corrosion and weathering for long service life.
• Watertight Seal: Features a flashing clamp for secure connection to roofing membranes.

Zurn Brand Quality

Applications of the Z111

• Commercial warehouses with metal deck roofing
• Industrial buildings and factories
• Large retail complexes with metal deck construction
• Institutional facilities such as gyms, schools, and community centers

Installation Best Practices

To maximize the performance of the Z111:

• Install at roof low points where stormwater naturally collects.
• Ensure the drain is securely fastened within the metal deck assembly.
• Apply proper flashing and sealants to create a watertight connection to roofing membranes.
• Inspect the dome and outlet regularly to prevent blockages and maintain flow capacity.
• Verify outlet pipe sizing matches hydraulic requirements for storm events.

Case Study: Warehouse Drainage Upgrade

Challenge: A large logistics warehouse with a metal deck roof experienced water ponding and leaks during seasonal storms due to outdated drainage components.

Solution: The facilities team upgraded to Zurn Z111 Roof Drains. These drains integrated seamlessly with the metal deck design and provided a watertight seal with the roofing membrane.

Outcome: After the upgrade, the warehouse roof drained effectively even during peak rainfall. Maintenance staff reported fewer leaks and reduced repair costs, improving both operational uptime and asset protection.

Conclusion

The Zurn Z111 12" Diameter Roof Drain for Metal Decks is a dependable solution for managing stormwater in commercial, industrial, and institutional buildings. Its specialized design, durability, and watertight integration make it a top choice for metal deck roofing systems.