Zurn Z125 Dome + Accessories

The Zurn Z125 roof drain features an 8-3/8 inch diameter Dura-coated cast iron body with a combination membrane flashing clamp and gravel guard. It comes standard with a low silhouette poly dome, and can be specified with a cast iron dome (Z125-CD), a clamping collar (Z125-CC), or a Top-Set deck plate with dome (Z125-DP).

Key Features

• 8-3/8 inch diameter cast iron body
• Combination membrane flashing clamp with gravel guard
• Variant options: cast iron dome (Z125-CD), clamping collar (Z125-CC), Top-Set deck plate with dome (Z125-DP)
• Supports multiple outlet types and accessory suffixes
• Compatible with standard and optional extensions

• Product / SKU: Z125 series
• Body material: Dura-coated cast iron
• Drain body diameter: 8-3/8 inches
• Standard dome: low silhouette poly dome
• Z125-CD: cast iron dome variant
• Z125-CC: clamping collar (secondary clamping ring accessory)
• Z125-DP: Top-Set deck plate version with dome and static extension optional
• Outlet types (depending on variant): Inside Caulk (IC), Threaded (IP), No-Hub (NH), Neo-Loc (NL)
• E (body height) dimensions vary by outlet type: e.g. for standard version IC = 3 7/8 in; IP = 2 7/16 in (2 in outlet), etc.
• Weight for standard dome version (for pipe sizes 2, 3, 4 in): ~14 lb
• Dome options: poly dome standard, cast iron dome optional

• Place the drain body so the top flange is flush or slightly below finished roof level.
• Connect the drain to the plumbing system using the specified outlet type.
• Secure membrane flashing under the clamp/gravel guard; if using the clamping collar (Z125-CC), add that over it.
• Install the dome: poly standard or cast iron dome (Z125-CD).
• For the deck plate version (Z125-DP), install the Top-Set deck plate and bolt from above.
• Confirm all seals, alignment, and fasteners before completing roof work.

Q: What is the standard dome on the Z125?
A: The standard dome is a low silhouette poly dome.

Q: What does the Z125-CD variant do?
A: Z125-CD is the cast iron dome option for the Z125.

Q: What is the purpose of Z125-CC?
A: Z125-CC is a clamping collar accessory used to secure membrane flashing and dome.

Q: What is included in Z125-DP?
A: Z125-DP is the Top-Set deck plate version, allowing top-side installation with its dome.

Q: Which outlet types are available for Z125 variants?
A: Available outlet types include Inside Caulk, Threaded, No-Hub, and Neo-Loc, depending on the variant.