Efficient roof drainage is essential for protecting buildings against water damage and structural stress. The Zurn 100C Froet Drain is a heavy-duty dual outlet roof drain engineered for reliability in commercial and industrial applications. Its innovative dual outlet design enhances water removal capacity, making it a preferred choice for flat and low-slope roofs in climates with frequent or heavy rainfall.

Zurn 100C Froet Drain Schematic

What Is the Zurn 100C Froet Drain?

The Zurn 100C Froet Drain is a cast-iron primary roof drain designed with a dual outlet feature. This configuration improves hydraulic efficiency by allowing water to exit through two pathways, ensuring consistent performance even in extreme rainfall conditions. The drain also features a dome strainer to prevent debris from entering the system, a flashing clamp for watertight installation, and compatibility with multiple roof membrane systems.

Key Features & Benefits

• Dual Outlet Design: Provides redundancy and increases flow capacity for storm-heavy environments.
• Durable Cast Iron Body: Ensures longevity, corrosion resistance, and reliability under harsh conditions.
• Dome Strainer: Prevents leaves, gravel, and debris from clogging the system while maintaining flow.
• Membrane Flashing Clamp: Creates a secure seal with roofing membranes for watertight integration.
• Versatile Application: Suitable for commercial, institutional, and industrial buildings with flat or low-pitch roofs.

Zurn Brand Quality

Applications

• Commercial facilities such as shopping centers, office complexes, and hospitals
• Institutional buildings including schools and municipal facilities
• Industrial buildings with large flat roof areas
• Retrofit projects where upgrading drainage capacity is critical

Installation Considerations

For best performance, the Zurn 100C Froet Drain should be installed at low points of roof slopes. Proper sealing of the flashing clamp with the roof membrane is critical to ensure watertightness. The dual outlets should be correctly aligned with piping systems to maximize flow efficiency. Access for periodic inspection of the dome strainer should also be provided.

Zurn 100C Froet Drain Dimensions

Case Study: Industrial Warehouse Application

Challenge: A regional warehouse with a 150,000 sq. ft. flat roof frequently experienced ponding water during seasonal storms, leading to roof deterioration and emergency repairs.

Solution: Engineers specified the Zurn 100C Froet Drain to improve drainage efficiency. The dual outlet design allowed water to evacuate quickly, even under heavy rain conditions, while the dome strainer protected against debris blockages.

Results: After installation, stormwater pooling was eliminated, and maintenance costs decreased by 40%. The building owner reported improved roof performance and confidence in long-term reliability.

Conclusion

The Zurn 100C Froet Drain is a powerful solution for roof drainage challenges, combining durability with an innovative dual outlet system. Its efficiency, versatility, and proven real-world performance make it an excellent choice for demanding commercial, institutional, and industrial projects.