Zurn Z100-W4 Roof Drain 4-In. Internal Water Dam

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

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Pipe Size
(in.) (A)
Weight (lbs.)
Dome Open
Area (sq. in.)
2 - 4 26 103
5, 6 27 103
8 28 103

ENGINEERING SPECS: Zurn Z100-W4 roof drain includes a dura-coated cast iron (DCCI) body with combination membrane flashing clamp / gravel guard, 4-in. internal water dam and low-silhouette poly-dome.




Outlet Types

Outlet Type Available Pipe
Sizes (in.)
Body Height
Dimension (E)
Inside Caulk (IC) 2 - 6, 8 5 1/4 in.
Threaded (IP) 2 - 6, 8 3 3/4 in.
No-Hub (NH) 2 - 6, 8 5 1/4 in.
Neo-Loc (NL) 2 - 4 4 9/16 in.
Neo-Loc (NL) 6 5 7/16 in.



Dome Options

Poly-Dome* with DCCI Body (Z)
6 3/4 In. High Aluminum Dome with DCCI Body (ZA)
Cast Iron Dome with DCCI Body (ZC)
Plain Bronze Dome with DCCI Body (ZRB)

*Regularly furnished unless otherwise specified



Available Accessories

Angular Underdeck Clamp (-AC) Galvanized Cast Iron (-G)
Acid Resistant Epoxy Coated (-AR) Galvanized Cast Iron Dome (ZC only) (-GD)
Bronze Mesh Screen Over Dome (-BS) 6 3/4 in. High Aluminum Dome Strainer (148 sq. in. open area) (-HD)
Underdeck Clamp (-C)  Roof Sump Receiver (-R)
Deck Extension (-DE) Secondary Clamping Collar (-SC)
Top-Set Deck Plate (Replaces both the -C and -R) (-DP) Stainless Steel Mesh Screen Over Dome (-SS)
Top-Set Drain Riser (-DR) Neo-Loc Test Cap Gasket (2 - 4 in.; NL bottom outlet only) (-TC)
Dex-o-Tex Flange (-DX) Vandal-Proof Secured Top (-VP)
Static Extension (1 - 4-in.; specify height) (-E) Stainless Steel Perforated Gravel Guard (-84)
Adjustable Extension Assembly (2 1/8 - 3 1/2 in.) (-EA) Stainless Steel Perforated Extension (-85)
Top-Set Adjustable Extension Assembly (-EB) 90° Threaded Side Outlet Body (2 - 6 in.) (-90)