Zurn Z121-DR Roof Drain - Top-Set Drain Riser

Dimensional data is subject to manufacturing tolerances and change without notice.

K = min. 2-3/4 in. | max. 6-7/8 in.

Pipe Size (in.)	Approx. Weight (lbs.)	Dome Open Area (sq. in.)
2 - 4, 6	59	78

ENGINEERING SPECS: Zurn Z121-DR 12-in. roof drain includes a dura-coated cast iron (DCCI) body with combination membrane flashing clamp / gravel guard, adapter ring, Top-Set® drain riser, drain riser flange, Top-Set® deck plate, and low-silhouette poly dome.

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	4-5/8

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 (-AR)
Stainless Mesh Screen Over Dome (-SS)
Bronze Mesh Screen Over Dome (-BS)
Neo-Loc Test Cap Gasket (2 - 4 in. NL Bottom Outlet Only) (-TC)
Deep Sump Body (-DB)
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)