High-capacity drainage is essential for large commercial roofs, and the Zurn Z1715 is designed to meet just that. This robust roof drain handles heavy rainfall while maintaining structural integrity and durability. In this blog, we’ll explore the Z1715’s design, advantages, best practices, and showcase a case study where it delivered performance in a challenging environment.

Zurn Z1715 Roof Drain Schematic

What Is the Zurn Z1715?

The Z1715 is a primary roof drain engineered for high flow capacity and heavy-duty applications. It is part of Zurn’s line of drains designed to manage large volumes of stormwater, making it suitable for expansive commercial and industrial roofs. The Z1715 is constructed with durability in mind and focuses on providing consistent drainage, even under extreme weather conditions.

Key Features & Benefits

• High Flow Capacity: Designed to handle intense rainfall events with ease.
• Robust Construction: Engineered with materials that resist corrosion and wear.
• Efficient Intake Design: Optimized for maximum water capture while minimizing clogging.
• Durable Dome/Strainer Option: Helps prevent debris ingress without sacrificing performance.
• Membrane Integration: Includes a secure flashing clamp or interface for watertight roof connections.

Applications Where the Z1715 Excels

• Large commercial buildings and warehouses
• Institutional facilities such as campuses and hospitals
• Industrial complexes with broad roof fields
• New construction or retrofit projects requiring high-capacity drainage

Installation Best Practices

For optimal performance, the Z1715 should be located at the lowest roof points with slope directed toward it. Ensure the flashing clamp or membrane interface is sealed correctly to prevent water infiltration. Dome or strainer access should remain clear for maintenance. During commissioning, verify that full storm conditions drain properly without clogging or overflow.

Zurn Brand Quality

Case Study: Logistics Center Roof Upgrade

Challenge: A distribution center with a 300,000 square-foot flat roof was experiencing ponding and structural stress during heavy storms. Existing drains were undersized and sometimes clogged, creating long-term risks.

Solution: The engineers replaced several underperforming drains with Zurn Z1715 units, positioning them at critical low points and tying into upgraded leader systems. The large capacity of each drain allowed multiple zones to be consolidated into fewer, more powerful drains.

Outcome: Following the upgrade, ponding was eliminated, maintenance calls dropped significantly, and roof life is now projected to extend well beyond previous forecasts. The facility manager noted improved drainage and peace of mind during heavy storm events.

Conclusion

The Zurn Z1715 Roof Drain stands out as a high-performance solution for large-scale roofing systems. With its heavy-duty construction, high flow capability, and design optimized for durability, it ensures reliable drainage in even the most demanding conditions.