--- title: Zurn Z121-E Roof Drain - Static Extension description: Find a product diagram and engineering specifications for the Zurn Z121-E roof drain with static extension and low silhouette dome. --- Search our inventory of drains, drain parts, safety and roofing equipment, and accessories. [Shop Now](https://hy-techroof.com/products/). - [ About ](https://www.hy-techroof.com/about-hy-tech/) - [ Contact ](https://www.hy-techroof.com/contact-hy-tech/) - - [![Hy-Tech Roof Products](https://resources.hy-techroof.com/hubfs/Logos/Hy-Tech%20Logo_rgb_maroon_480.png) ](https://www.hy-techroof.com) [**](https://www.hy-techroof.com/login.php) [**](https://www.hy-techroof.com/cart.php) ** ** [![Hy-Tech Roof Products](https://resources.hy-techroof.com/hubfs/Logos/Hy-Tech%20Logo_rgb_maroon_480.png) ](https://www.hy-techroof.com) [**](https://www.hy-techroof.com/cart.php) - - # Zurn Z121-E Roof Drain - Static Extension *Dimensional data is subject to manufacturing tolerances and change without notice.* ![zurn-z121-e](https://resources.hy-techroof.com/hs-fs/hubfs/zurn-z121-e.jpeg?width=519&name=zurn-z121-e.jpeg) **ENGINEERING SPECS:** Zurn Z121-E 12-in. roof drain includes a dura-coated cast iron (DCCI) body with combination membrane flashing clamp / gravel guard, static extension, and low-silhouette poly dome.   | **Pipe Size (A) (in.)** | **Approx. ** **Weight (lbs**.) | **Dome Open ** **Area (sq. in.)** | | --- | --- | --- | | 2 - 4, 6 | 26 | 78 |   ## Outlet Types | **Outlet Type** | **Available Pipe Sizes (in.)** | **Body Height Dimension (E) (in.)** | | --- | --- | --- | | Inside Caulk (IC) | 2 - 4, 6 | 5-1/4 | | Threaded (IP) | 2 - 4, 6 | 3-3/4 | | No-Hub (NH) | 2 - 4, 6 | 5-1/4 | | Neo-Loc (NL) | 2 - 4 | 4-9/16 | ## Dome Options - Poly Dome* (4-1/4 in. height) with DCCI Body (Z) - Aluminum Dome (6-9/16 in. height) with DCCI Body (ZA) - Cast Iron Dome (4-1/4 in. height) with DCCI Body (ZC) - Plain Bronze Dome (3-7/8 in. height) with DCCI Body (ZRB) **Regularly furnished unless otherwise specified*   ## Available Accessories - Acid Resistant Epoxy Coated Finish (-AR) - Secondary Clamping Collar (-SC) - Bronze Mesh Screen Over Dome (-BS) - Stainless Mesh Screen Over Dome (-SS) - Underdeck Clamp (-C) - Neo-Loc Test Cap Gasket (2 - 4 in. NL Bottom Outlet Only) (-TC) - Top-Set® Roof Deck Plate (Replaces both underdeck clamp and roof sump receiver) (-DP) - Vandal-Proof Secured Top (-VP) - Adjustable Drain Riser Extension Assembly (from 3-5/8 to 7-1/4 in.) (-DR) - Vertical Expansion Joint (-XJ) - Top-Set® Adjustable Extension Assembly (-EB) - Stainless Steel Perforated Gravel Guard (-84) - Flush Grate (Replaces dome strainer) (-FG) - Stainless Steel Perforated Extension (-85) - Galvanized Cast Iron (-G) - 2-in. 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