Zurn Z100 15" Diameter Main Roof Drain with Low Silhouette Dome.

The Zurn Z100 Roof Drain is a durable, heavy-duty solution designed for commercial and industrial roofing applications. Featuring a 15" (381 mm) diameter body with a low silhouette dome, this drain ensures reliable performance and efficient water removal while maintaining a clean, flush appearance on flat or low-slope roofs.

Constructed with a Dura-Coated cast iron body, the Z100 provides long-lasting protection against wear and corrosion. The combination membrane flashing clamp and gravel guard ensure secure installation and dependable drainage in even the most demanding conditions.

Features & Benefits

• 15" (381 mm) large diameter roof drain for maximum flow capacity

• Heavy-duty Dura-Coated cast iron body for strength and corrosion resistance

• Low silhouette dome design reduces rooftop obstructions

• Multiple dome material options: Poly-Dome, Aluminum, Cast Iron, or Bronze

• Combination flashing clamp and gravel guard for secure installation

• Flexible outlet options: Inside Caulk, Threaded, No-Hub, or Neo-Loc

• Designed for long-term commercial and industrial roof applications

Available Options

• Prefixes / Dome Material:

  • Z: Cast Iron Body with Poly-Dome

  • ZA: Cast Iron Body with Aluminum Dome

  • ZC: Cast Iron Body with Cast Iron Dome

  • ZRB: Cast Iron Body with Bronze Dome

• Outlet Types:

  • IC: Inside Caulk

  • IP: Threaded

  • NH: No-Hub

  • NL: Neo-Loc

• Pipe Sizes: 2", 3", 4", 6", or 8" (depending on outlet type)

Specifications

• Body Diameter: 15" (381 mm)

• Body Material: Dura-Coated Cast Iron

• Dome Material Options: Poly, Aluminum, Cast Iron, or Bronze

• Body Height: 3 ¾" to 5 ¼" (depending on outlet type)

• Applications: Commercial, industrial, and institutional roofing systems

Installation Tips

• Ensure the correct outlet type is selected for your piping system.

• Use proper sealants and flashing membranes to maintain a watertight installation.

• For optimal performance, install at the lowest drainage point on the roof surface.

FAQs

Q: What size roof drains are available in the Z100 series?
A: The Z100 is available in 2", 3", 4", 6", and 8" outlet sizes depending on the connection type.

Q: Can I choose a different dome material?
A: Yes. The Z100 offers options in Poly-Dome, Aluminum, Cast Iron, or Bronze domes to suit your project requirements.

Q: Is this roof drain suitable for commercial applications?
A: Yes. The Z100 is engineered for heavy-duty commercial and industrial roofing systems.