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Zurn Z104 - 20" 15" Diameter Deep Sump Roof Drain

Zurn Z104 - 20" 15" Diameter Deep Sump Roof Drain

Zurn Z104 - 20" 15" Diameter Deep Sump Roof Drain

$2,609.60


FREE SHIPPING
SKU Z104-3NH

The Zurn Z104 is designed for commercial and industrial roofing projects that demand dependable drainage, durability, and ease of maintenance. Built to manage substantial water flow, this drain helps protect the roofing assembly by reducing ponding, resisting debris buildup, and maintaining roofline integrity over time.

Key Features

  • Heavy-Duty Construction: Rugged materials (likely cast iron or reinforced metals) and protective coatings ensure long service life under demanding weather and load conditions.

  • Secure Membrane Flashing Clamp & Debris Guard: Helps maintain waterproof integrity by securing the roofing membrane and preventing gravel or debris entry that can clog the system.

  • Low-Profile Strainer/Dome: Streamlined shape minimizes roof obstruction while offering sufficient open area to allow high flow and easy cleanup.

Downloads:

Product Codes: Z104-20-2IC, Z104-20-3IC, Z104-20-4IC, Z104-20-5IC, Z104-20-6IC, Z104-20-8IC, Z104-20-2IP, Z104-20-3IP, Z104-20-4IP, Z104-20-5IP, Z104-20-6IP, Z104-20-8IP, Z104-20-2NH, Z104-20-3NH, Z104-20-4NH, Z104-20-5NH, Z104-20-6NH, Z104-20-8NH, Z104-20-2NL, Z104-20-3NL, Z104-20-4NL, Z104-20-5NL, Z104-20-6NL, Z104-20-8NL, ZA104-20-2IC, ZA104-20-3IC, ZA104-20-4IC, ZA104-20-5IC, ZA104-20-6IC, ZA104-20-8IC, ZA104-20-2IP, ZA104-20-3IP, ZA104-20-4IP, ZA104-20-5IP, ZA104-20-6IP, ZA104-20-8IP, ZA104-20-2NH, ZA104-20-3NH, ZA104-20-4NH, ZA104-20-5NH, ZA104-20-6NH, ZA104-20-8NH, ZA104-20-2NL, ZA104-20-3NL, ZA104-20-4NL, ZA104-20-5NL, ZA104-20-6NL, ZA104-20-8NL, ZC104-20-2IC, ZC104-20-3IC, ZC104-20-4IC, ZC104-20-5IC, ZC104-20-6IC, ZC104-20-8IC, ZC104-20-2IP, ZC104-20-3IP, ZC104-20-4IP, ZC104-20-5IP, ZC104-20-6IP, ZC104-20-8IP, ZC104-20-2NH, ZC104-20-3NH, ZC104-20-4NH, ZC104-20-5NH, ZC104-20-6NH, ZC104-20-8NH, ZC104-20-2NL, ZC104-20-3NL, ZC104-20-4NL, ZC104-20-5NL, ZC104-20-6NL, ZC104-20-8NL,

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  • 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 Z104 20" x 15" Diameter Deep Sump Roof Drain: An Overview

Explore the features, applications, and benefits of the Zurn Z104 deep sump roof drain, engineered for high-capacity performance.

For large commercial and institutional roofs, handling heavy stormwater volumes requires more than standard roof drains. The Zurn Z104 20" x 15" Diameter Deep Sump Roof Drain is specifically designed to manage substantial runoff, prevent ponding, and extend roof system life. With its deep sump bowl, wide flange, and durable dome cover, the Z104 is trusted for projects where maximum performance is a must.

Zurn Z104 Roof Drain Schematic
Zurn Z104 Roof Drain Schematic

What Is the Zurn Z104?

The Z104 is a deep sump roof drain with a 20-inch flange and a 15-inch diameter bowl. Its deep sump design provides increased hydraulic efficiency by allowing greater water collection before entering the outlet pipe. This makes it ideal for large roofs subject to intense rainfall events. Its construction supports watertight integration with roofing membranes for long-lasting performance.

Key Features & Benefits

  • Deep Sump Design: Enhances hydraulic efficiency and reduces the risk of ponding.
  • 20" Flange, 15" Bowl: Large intake capacity for high-volume stormwater control.
  • Durable Dome: Protects against debris clogging while maintaining high intake flow.
  • Reliable Membrane Integration: Flange design ensures watertight attachment to roofing systems.
  • Long-Term Performance: Built to withstand extreme weather conditions and rooftop exposure.
Zurn Brand Logo
Zurn Brand Quality

Applications of the Z104

  • Commercial buildings with expansive flat roofs
  • Hospitals, schools, and other institutional facilities
  • Industrial plants and warehouses
  • Projects requiring maximum stormwater intake capacity

Installation Best Practices

To ensure optimal performance, the Z104 should be installed with the following best practices:

  • Locate drains at roof low points to maximize water collection.
  • Integrate the flange securely into the roofing membrane to prevent leaks.
  • Ensure outlet pipe sizing matches hydraulic flow calculations.
  • Inspect domes regularly to clear debris and confirm uninterrupted flow.
  • Conduct post-installation water testing to verify proper drainage capacity.

Case Study: Industrial Distribution Center

Challenge: A large distribution center faced repeated ponding and drainage failures during seasonal storms. Standard drains were unable to manage the water volume, leading to costly roof repairs.

Solution: The facility installed Zurn Z104 Deep Sump Roof Drains across the flat roof. The deep sump and large bowl diameter provided the hydraulic capacity required to manage runoff effectively.

Outcome: The Z104 eliminated ponding, reduced membrane stress, and minimized maintenance costs. The center now has confidence in its drainage system even during severe weather events.

Conclusion

The Zurn Z104 20" x 15" Diameter Deep Sump Roof Drain is a high-capacity solution for demanding roofing applications. With its deep sump design, large bowl, and durable construction, it ensures reliable stormwater management for commercial, industrial, and institutional projects.

Frequently Asked Questions

What makes the Z104 different from standard roof drains?

Its deep sump design provides higher hydraulic efficiency, allowing it to manage significantly larger volumes of water.

Where is the Z104 most commonly used?

It is typically installed in commercial, institutional, and industrial buildings with expansive flat roofing systems.

How should the Z104 be maintained?

Perform seasonal inspections, clear debris from the dome, and verify watertight seals to ensure long-term performance.