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Description
The Zurn Z121 roof drain features a 12-inch diameter Dura-coated cast iron body with a combination membrane flashing clamp and gravel guard. It can be specified with a low silhouette cast iron dome (variant Z121-CD), a matching clamping ring (Z121-CC), or a topside install Top-Set deck plate (Z121-DP).
Key Features
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12-inch diameter Dura-coated cast iron body
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Combination membrane flashing clamp and gravel guard
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Cast iron dome variant (Z121-CD)
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Clamping ring available (Z121-CC)
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Top-Set deck plate for topside installation (Z121-DP)
Specifications
- Product / SKU: Z121 series
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Body material: Dura-coated cast iron
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Drain diameter: 12 inches (305 mm)
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Dome type: low silhouette poly dome standard; cast iron dome variant Z121-CD
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Clamping ring: Z121-CC, cast iron clamp ring
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Deck plate: Z121-DP, Top-Set deck plate with dome
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Outlet types: Inside Caulk (IC), Threaded (IP), No-Hub (NH), Neo-Loc (NL)
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Body heights (“E” dimension) per outlet type (Z121-DP): IC = 5-1/4 in, IP = 3-3/4 in, NH = 5-1/4 in, NL = 4-9/16 in
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Weight (Z121-DP, 2–6 in pipe sizes with dome): approximately 31 lb
How To
- Set the drain body so the top flange aligns with the finished roof surface or slightly below.
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Connect the outlet using the chosen type (IC, IP, NH, NL).
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If using the clamping ring (Z121-CC), secure the membrane flashing under the ring.
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Attach the dome: either standard poly dome or cast iron dome (Z121-CD).
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For above-deck installation, use the Top-Set deck plate (Z121-DP) to bolt the body from topside.
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Confirm all components are sealed, aligned, and secured before roofing finish.
FAQs
Q: What material is the Z121 body?
A: The body is Dura-coated cast iron.
Q: What dome types are available?
A: Standard poly dome or cast iron dome variant (Z121-CD).
Q: What is the Z121-CC clamping ring?
A: The Z121-CC is a cast iron clamping ring designed to secure membrane flashing and dome to the body.
Q: What does Z121-DP do?
A: The Z121-DP includes a Top-Set deck plate, enabling topside installation without underdeck clamps.
Q: What outlet types are supported for Z121-DP?
A: IC, IP, NH, and NL outlets are supported for the Z121-DP variant.
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Zurn ZC121 12" Diameter Main Roof Drain - Cast Iron Dome
For New & Retrofit Installations
Price: CALL
Availability: Out of Stock
The Zurn ZC121 roof drain is built with a Dura-coated cast iron body designed for rooftop drainage. It includes a combination membrane flashing clamp and gravel guard, and accommodates multiple outlet types and dome variants for flexible installation. Key Features 12-inch diameter Dura-coated cast iron body Combination membrane flashing clamp and gravel guard Low silhouette dome options (cast iron or poly) Available in multiple outlet types Supports accessory options like underdeck clamps and...