In many roof designs, water doesn’t always flow straight to a downspout or drain pipe. For corners, parapets, or angled roof edges, a specialized scupper is needed. The Zurn Z160 135° Scupper Drain is engineered to handle water flow around corners by channeling it through a 135° angled path, preserving the roofing and wall envelope integrity while maintaining efficient drainage.

Zurn Z160 Installation Schematic

What Is the Zurn Z160?

The Z160 is a 135° scupper drain designed for parapet walls or roof edges where water must turn a corner before exiting. Rather than a straight-through scupper, this angled unit enables a smoother path for water at corners without stressing the roof or wall interface. It is built with durable materials and dimensional integrity so the angled flow remains consistent over time.

Key Features & Benefits

• 135° Flow Path: Ideal for roof corners or angled parapet walls where water must turn to exit.
• Durable Construction: Designed for rooftop exposure, thermal cycles, and long-term performance.
• Watertight Integration: Properly sealed to roofing and wall systems to prevent leaks.
• Space-Efficient: Provides angled drainage without bulky offsets or additional piping.
• Versatile Use: Suitable in new construction or retrofit settings where angled scuppers are needed.

Zurn Brand Quality

Applications of the Z160

• Roof corners where drainage must turn 135° before exiting
• Parapet walls with non-linear design geometries
• Architectural or historic buildings needing angled scuppers
• Retrofits where piping realignment may not be feasible

Installation Best Practices

To ensure reliable performance of the Z160:

• Align the drain so the 135° bend matches your roof geometry.
• Seal the interfaces thoroughly to roof and wall membranes to prevent infiltration.
• Provide proper slope into the scupper opening to feed water without backup.
• Inspect after storms to clear blockages and verify flow path.
• Perform periodic checks to confirm seal integrity as building materials shift over time.

Zurn Z160 Schematic

Case Study: Corner Drain Retrofit

Challenge: A commercial rooftop had a 90° building corner that caused stormwater to back up, saturating membrane edges and causing occasional leaks.

Solution: The design team installed a Zurn Z160 135° Scupper Drain at the corner, providing a smooth angled exit path for water without requiring complex piping rerouting.

Outcome: After installation, the corner drained correctly during heavy rainfall, eliminating prior ponding. Maintenance staff noted improved performance and fewer moisture intrusion reports at the wall line.

Conclusion

The Zurn Z160 135° Scupper Drain offers a smart, compact solution for roof corners and non-linear parapet configurations. Its angled geometry, durable construction, and watertight design make it a strong choice for new builds or upgrades where conventional scuppers won’t suffice.