Smith 1320 12-in. Roof Drain Specs & Options

Dimensions are subject to manufacturing tolerance and change without notice. 

Download Specifications PDF 

Smith 1320 Roof Drain

Outlet Size (A) 2 in. 3 in. 4 in.
B 4-1/2 4 3-1/2
C 6 6 6
*D 7-1/4 7-1/2 7-3/4
E 6-1/2 6-5/8 6-5/8

* For No-Hub outlets this dimension is 9 in.

Specifications: The Smith 1310 roof drain is used in flat roof construction where a medium-sized drain is required. Its low profile dome protects the drain sump and intercepts from debris. A flashing clamp holds flashing and roofing materials without puncturing. Regularly furnished with a Duco cast iron body with combined flashing clamp, gravel stop and polyethylene dome. 


Recommended Deck Openings

Outlet Size (in.) With Sump
Receiver (.in)
Without Sump
Receiver (.in)
2 - 4 in.  13 dia. 11 dia.





Outlet Types

Caulk Outlet 
No-Hub Outlet
Threaded Outlet




Extension (specify height) (-E)
"L" Shaped Underdeck Clamp (-CL)
No-Hub Adaptor (Specify Fig. 2646Y)
Secondary Flashing Clamp (-C2)
2 in. Solid Water Dam (-WD)
Sump Receiver (-R)
Underdeck Clamp (-C)
Vandal Proof Dome (-U)



Optional Materials

Aluminum Dome (-AD)
Cast Iron Dome (-CID)
Galvanized Cast Iron Dome (-CIDG)
Galvanized Cast Iron Body & Collar (-G)
Rough Bronze Dome (-RBD)