When architectural elegance meets the challenge of water runoff, the right cornice drain is essential. The Zurn Z180 Cornice Roof Drain is engineered to protect building cornices, ledges, and facades by efficiently draining water while preserving aesthetics. In this guide, we cover specifications, benefits, installation best practices, and a case study showing its performance on a real project.

Zurn Z180 Installation Schematic

What Is the Zurn Z180?

The Zurn Z180 is a compact cornice roof drain designed to manage runoff along building edges without compromising design intent. Its durable body, protective dome, and membrane clamp deliver dependable performance while remaining visually discreet on parapets and architectural ledges.

Key Features & Benefits

• Durable Construction: Built for long service life in exterior environments.
• Protective Dome: Keeps debris out while maintaining strong intake area.
• Membrane Flashing Clamp: Creates a watertight integration with roofing membranes.
• Low Profile: Compact height fits into cornice and edge details with minimal visual impact.
• Outlet Flexibility: Offered in common sizes and connection types to match leader piping.

Zurn Brand Quality

Applications of the Z180

• Architectural cornices and decorative building facades
• Parapet walls and roof edges where aesthetics and function must align
• Historic renovation where original detailing must be preserved
• Commercial and institutional buildings with visible roof edges or overhangs

Installation Best Practices

To maximize performance, install the Z180 at low points so water naturally flows to the drain. Secure the membrane clamp to ensure a leak-free transition between the drain and roofing membrane, select outlet size/connection to match system hydraulics, and maintain access to the dome for routine cleaning. Confirm that overall height and footprint meet architectural constraints.

Zurn Z180 Measurement Schematic

Case Study: Heritage Office Building Edge Protection

Challenge: A heritage office building with ornate cornice detailing faced recurring water staining and masonry deterioration. The existing drains were undersized and visually intrusive.

Solution: The renovation team installed Zurn Z180 cornice drains at key edges. The compact profile preserved the building’s appearance while the protective dome maintained reliable intake. Outlet connections were matched to existing downspouts using compatible fittings.

Outcome: After a full rainy season, stains were eliminated, masonry distress decreased, and emergency maintenance calls dropped significantly. The low-profile design kept the original cornice aesthetics intact.

Maintenance Checklist

• Clear the dome seasonally and after major storms.
• Verify watertightness at the membrane clamp during routine inspections.
• Confirm overflow pathways are unobstructed along the edge details.

Conclusion

The Zurn Z180 Cornice Roof Drain offers a smart balance of durability, performance, and aesthetics. Its compact height, secure membrane interface, and debris-resistant dome make it a go-to option for both restorations and new builds where edge details must stay clean and protected.