In rooftop terraces, promenades, plazas, and deck surfaces where aesthetics matter, drainage must both perform and blend into design. The Zurn Z158-DT 10" Square Top Prom-Deck Drain combines functional performance with decorative appeal, offering a square top grate and a rotatable frame to align grate orientation cleanly with decking patterns. In this post, we’ll explore how it works, where it’s used, and how to install and maintain it for long-term performance.

Prom-Deck Drain Installation Detail

What Is the Zurn Z158-DT?

The Z158-DT is a **10-inch square top promenade deck drain** built for architectural applications. It features a decorative grate to match paving aesthetics, and a **rotatable frame** so the orientation of the grate can align with the pattern of the deck (e.g. tile, stone, pavers). This flexibility allows designers to maintain visual harmony while still delivering robust drainage performance.

Key Features & Benefits

• Square Decorative Grate: Aesthetic grate that complements paving and deck finishes.
• Rotatable Frame: Allows the grate to be rotated to align with deck pattern without reworking the drain body.
• High Functionality: Performs as a primary deck drain capable of handling runoff while preserving visual coherence.
• Integrated Design: Flush-mounted appearance in deck surfaces for safe, clean integration.
• Durable Construction: Engineered for outdoor exposure, load conditions, and debris protection.

Where the Z158-DT Shines

• Rooftop terraces, promenades, and rooftop plazas
• Decks with patterned paving or tile layouts
• Architectural projects where visual continuity matters
• Outdoor pedestrian zones needing discreet drainage

Installation Best Practices

To make sure the Z158-DT delivers both design and performance, follow these tips:

• Set the drain exactly flush with the deck finish to avoid tripping hazards.
• Install the rotatable frame before final paver layout so you can align the decorative grate correctly.
• Seal the deck finish edges around the drain to prevent water infiltration behind the deck substrate.
• Ensure proper slope toward the drain so water flows naturally into it without ponding.
• Provide clear access to the grate for cleaning and inspection of debris.

Zurn Z158-DT Drain Schematic

Case Study: Rooftop Promenade

Challenge: A building owner wanted a rooftop promenade with decorative pavers, integrated seating, and fountain features. They needed drains that would not interrupt the paving pattern visually.

Solution: The design team selected Zurn Z158-DT Prom-Deck Drains. The rotating grate frame allowed alignment with the paver layout, and the decorative grate matched the aesthetic demands. The drains were placed at low points throughout the terrace.

Outcome: The promenade drains effectively during storms, and the visual design remains clean and uninterrupted. Maintenance staff reported easy access to grates for cleaning, and no drainage or visual complaints from occupants.

Conclusion

The Zurn Z158-DT 10" Square Top Prom-Deck Drain marries aesthetic flexibility with reliable drainage performance. Its decorative grate and rotatable frame make it ideal for high-visibility deck projects where design and function must coexist. For terraces, promenades, and architectural paving applications, it offers a clean, effective solution.