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Zurn Z101 - 20" Diameter Main Roof Drain Low Silhouette Dome

Zurn Z101 - 20" Diameter Main Roof Drain Low Silhouette Dome

Zurn Z101 - 20" Diameter Main Roof Drain Low Silhouette Dome

$2,076.90


FREE SHIPPING
SKU Z101-8NH

The Zurn Z101 is a 20-inch high-capacity roof drain built to manage heavy stormwater loads on large commercial, industrial, and institutional buildings. Engineered for both performance and durability, it combines a rugged cast iron body with a low-profile dome that keeps the roofline clean while ensuring reliable flow. Ideal for flat or low-slope roofs, the Z101 helps prevent ponding, protects roof assemblies, and supports long service life in demanding conditions.

Key Features

  • Durable Construction: Heavy-duty cast iron body with protective coating resists corrosion, impact, and long-term environmental wear.

  • Secure, Efficient Drainage: Integrated flashing clamp and gravel guard maintain waterproofing integrity while keeping debris from obstructing flow.

  • Streamlined High-Capacity Dome: Low-silhouette cast iron dome provides a large open area for rapid water evacuation while preserving a clean roof appearance.

Downloads:

Product Codes: Z101-8NH, Z101-10NH, Z101-12NH, Z101-14NH, Z101-16NH, Z101-8NL, Z101-10NL, Z101-12NL, Z101-14NL, Z101-16NL, ZB101-8NH, ZB101-10NH, ZB101-12NH, ZB101-14NH, ZB101-16NH, ZB101-8NL, ZB101-10NL, ZB101-12NL, ZB101-14NL, ZB101-16NL, ZN101-8NH, ZN101-10NH, ZN101-12NH, ZN101-14NH, ZN101-16NH, ZN101-8NL, ZN101-10NL, ZN101-12NL, ZN101-14NL, ZN101-16NL,

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Shipping

  • All items ship for free (standard ground, see map)
  • Call: (800) 604-5537 for pricing and shipping questions. Shipping estimates shown on the map pertain to this specific product only.
  • Orders typically ship in 1-3 business days. Transit times displayed in the map are listed in business days, and are approximate. The day that the order is shipped is not counted as a transit day.
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Zurn Z101 Main Roof Drain with Low Silhouette Dome: An Overview

Features, benefits, installation insights, and real-world performance of the Zurn Z101

Large-scale roofing systems require reliable drainage to protect structural integrity and prevent costly water damage. The Zurn Z101 20" Diameter Main Roof Drain with Low Silhouette Dome is designed for heavy-duty applications, delivering exceptional performance in commercial, industrial, and institutional settings. With its wide diameter and low-profile dome, the Z101 maximizes water intake while resisting debris clogs, making it an essential choice for demanding roof environments. This guide covers its features, applications, installation considerations, and a real-world case study.

Zurn Z101 Roof Drain Schematic
Zurn Z101 Roof Drain Schematic

What Is the Zurn Z101?

The Z101 is a 20-inch main roof drain featuring a low silhouette dome strainer designed for high-capacity water collection. The dome’s wide intake area ensures maximum drainage efficiency, while its low profile reduces exposure to wind uplift and minimizes visibility on the roof surface. Constructed from heavy-duty materials, the Z101 is built to perform in demanding environments.

Key Features & Benefits

  • 20" Diameter Design: Provides large-capacity drainage for expansive roofs.
  • Low Silhouette Dome: Maximizes water intake while resisting wind uplift and debris interference.
  • Durable Construction: Built with corrosion-resistant materials for long service life.
  • Secure Flashing Clamp: Ensures watertight integration with roof membranes.
  • High Performance: Suitable for heavy rainfall and high-flow environments.
Zurn Brand Logo
Zurn Brand Quality

Applications of the Z101

  • Commercial buildings with large flat roofs
  • Industrial facilities requiring robust drainage systems
  • Institutional campuses such as hospitals and universities
  • Warehouses and distribution centers

Installation Considerations

For optimal performance, the Z101 should be installed at roof low points to ensure efficient collection of stormwater. The low silhouette dome must remain accessible for inspection and cleaning. Proper integration with the roof membrane via the flashing clamp is critical to maintain a watertight seal and extend system longevity.

Zurn Z101 Roof Drain Components
Zurn Z101 Roof Drain Components

Case Study: Industrial Distribution Center

Challenge: A 500,000 sq. ft. distribution facility was experiencing pooling on its expansive flat roof due to undersized and outdated drains. This created risks of roof leaks and increased structural stress.

Solution: The engineering team replaced the outdated drains with Zurn Z101 20" Main Roof Drains. The low silhouette dome provided maximum water intake, even during heavy storms, while resisting clogging from rooftop debris.

Outcome: The facility eliminated pooling issues, reduced maintenance calls, and improved roof safety. The Z101 drains delivered reliable performance and increased the roof system’s lifespan.

Conclusion

The Zurn Z101 20" Main Roof Drain with Low Silhouette Dome is an ideal solution for large-scale roofing systems requiring high-capacity drainage. Its combination of wide diameter, durable design, and low-profile dome makes it a reliable choice for demanding commercial, industrial, and institutional applications.

Frequently Asked Questions

What makes the Z101 suitable for large roofs?

Its 20" diameter and low silhouette dome provide maximum intake capacity for high-volume stormwater drainage.

How does the low silhouette dome help?

It resists wind uplift, prevents clogging from debris, and ensures steady water intake during storms.

Where should the Z101 be installed?

At roof low points where water naturally collects for efficient drainage.

Is the Z101 suitable for industrial use?

Yes, its high-capacity design and durable construction make it ideal for warehouses, factories, and distribution centers.