Dimensional data is subject to manufacturing tolerances and change without notice.
Specifications: Zurn Z121-BS 12-in. roof drain includes a dura-coated cast iron (DCCI) body with combination membrane flashing clamp / gravel guard, and a low-silhouette cast iron dome with bronze mesh screen.
| Pipe Size (in.) |
Approx Weight (lbs) |
Dome Open Area (sq in.) |
| 2, 3, 4, 5, 6 |
22 |
78 |
Outlet Types
- Inside Caulk (IC)
- Threaded (IP)
- No-Hub (NH)
Dome Options
- Dome* (4-1/4 in. height) with DCCI Body (Z)
- Aluminum Dome (6-9/16 in. height) with DCCI Body (ZA)
- Plain Bronze Dome (3-7/8 in. height) with DCCI Body (ZRB)
*Regularly furnished unless otherwise specified.
Accessories
- Acid Resistant Epoxy Coated (-AR)
- Roof Sump Receiver (-R)
- Underdeck Clamp (-C)
- Secondary Clamp Collar (-SC)
- Top-Set® Roof Deck Plate (Replaces both the 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) (-DR)
- Vertical Expansion Joint (-XJ)
- Static Extension (1 - 4-in.; specify height) (-E)
- Stainless Steel Perforated Extension (-85)
- Top-Set® Adjustable Extension Assembly (-EB)
- 2-in. High External Water Dam (-89)
- Flush Grate (Replaces dome strainer) (-FG)
- 90° Threaded Side Outlet Body (2 - 4-in.) (-90)
- Galvanized Cast Iron (-G)
