Dimensional data is subject to manufacturing tolerances and change without notice.
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ENGINEERING SPECS: Zurn Z121-DP 12-in. roof drain includes a dura-coated cast iron (DCCI) body with combination membrane flashing clamp / gravel guard, Top-Set® Deck Plate, and and low-silhouette cast-iron dome.
Pipe Size (in.) |
Approx. Weight (lbs.) |
Dome Open Area (sq. in.) |
2 - 6 |
31 |
78 |
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Outlet Types
Outlet Type |
Available Pipe Sizes (in.) |
Body Height Dimension (in.) (E) |
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
- 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
Available Accessories
- Acid Resistant Epoxy Coated (-AR) Neo-Loc
- Test Cap Gasket (2 - 4 in. NL Bottom Outlet Only) (-TC)
- Bronze Mesh Screen Over Dome (-BS)
- Vandal-Proof Secured Top (-VP)
- Static Extension (1 - 4-in.; specify height) (-E)
- Vertical Expansion Joint (-XJ)
- Flush Grate (Replaces dome strainer) (-FG)
- Stainless Steel Perforated Gravel Guard (-84)
- Galvanized Cast Iron (-G) Stainless Steel
- Perforated Extension (-85)
- Secondary Clamping Collar (-SC) 2-in. High
- External Water Dam (-89)
- Stainless Mesh Screen Over Dome (-SS) 90°
- Threaded Side Outlet Body (2 - 4-in. only) (-90)