Flat roofs and parapet walls need dedicated outlets to move water off the roof safely. A flat roof drain scupper routes runoff through the parapet wall, reducing ponding, leaks, and façade damage. The Zurn Z1717 is engineered for dependable, watertight scupper drainage in both new builds and retrofit projects, delivering durable protection at the roof edge.

Zurn Z1717 Flat Roof Drain Scupper

What Is a Flat Roof Drain Scupper?

A flat roof drain scupper is an opening and drain assembly that channels water through a parapet wall to the exterior, preventing buildup at the roof edge. The Zurn Z1717 combines robust construction with a watertight interface to move water efficiently away from the roof system and building envelope, even in harsh rooftop environments.

Key Features & Benefits

• Targeted Roof-Edge Drainage: Directs water through parapet walls to reduce ponding and leaks.
• Durable Construction: Built to withstand UV, temperature swings, and rooftop exposure.
• Watertight Integration: Protects vulnerable roof edges and wall assemblies from infiltration.
• Versatile Application: Suited for both retrofit upgrades and new construction.
• Low-Maintenance Design: Easy inspection and debris clearing help maintain flow.

Zurn Brand Quality

Where Flat Roof Drain Scuppers Are Used

• Commercial buildings with parapet walls on flat roofs
• Institutional facilities (schools, hospitals) needing controlled wall drainage
• Warehouses and industrial properties with frequent storm exposure
• Retrofits to improve roof-edge drainage and protect façades

Installation Best Practices

For reliable results with the Zurn Z1717 Flat Roof Drain Scupper:

• Install flush to the parapet wall to promote smooth flow through the opening.
• Apply compatible waterproofing around the drain body for a continuous seal.
• Verify roof slope directs runoff toward the scupper inlet.
• Schedule routine inspections to remove debris and maintain capacity.

Zurn Z1717 Scupper – Technical Schematic

Case Study: Parapet Wall Drainage Upgrade

Challenge: A retail center experienced wall staining and leaks from water collecting at the roof edge.

Solution: The facilities team installed Zurn Z1717 Flat Roof Drain Scuppers along parapet walls. The watertight connection and direct-through-wall discharge redirected water away from vulnerable areas.

Outcome: Water intrusion was eliminated, façade maintenance decreased, and the building envelope gained long-term protection.

Conclusion

The Flat Roof Drain Scupper (Zurn Z1717) offers a durable, watertight approach to managing roof-edge runoff. Its straightforward installation, versatility, and low maintenance make it an excellent choice for both new construction and retrofit projects seeking reliable parapet wall drainage.