--- title: Smith 1320 Roof Drain Specs & Options description: Find a diagram and engineering specifications for the Smith 1320 12-in. side-outlet roof drain. --- Search our inventory of drains, drain parts, safety and roofing equipment, and accessories. [Shop Now](https://hy-techroof.com/products/). - [ About ](https://www.hy-techroof.com/about-hy-tech/) - [ Contact ](https://www.hy-techroof.com/contact-hy-tech/) - - [![Hy-Tech Roof Products](https://resources.hy-techroof.com/hubfs/Logos/Hy-Tech%20Logo_rgb_maroon_480.png) ](https://www.hy-techroof.com) [**](https://www.hy-techroof.com/login.php) [**](https://www.hy-techroof.com/cart.php) ** ** [![Hy-Tech Roof Products](https://resources.hy-techroof.com/hubfs/Logos/Hy-Tech%20Logo_rgb_maroon_480.png) ](https://www.hy-techroof.com) [**](https://www.hy-techroof.com/cart.php) - - # Smith 1320 Roof Drain Specs & Options *Dimensional data is subject to manufacturing tolerances and change without notice.* ### [*Download Specifications PDF*](https://www.jrsmith.com/uploads/fileLibrary/d1310.pdf) | **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. |   *[![Find and Buy Smith Roof Drains](https://no-cache.hubspot.com/cta/default/10783/8114ace5-1719-482e-8b86-7f1517b618a7.png)](https://cta-redirect.hubspot.com/cta/redirect/10783/8114ace5-1719-482e-8b86-7f1517b618a7)* ## Outlet Types - Caulk Outlet - No-Hub Outlet - Threaded Outlet ## Variations - 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) - [Drains](https://www.hy-techroof.com/products/drains/) - [Zurn](https://www.hy-techroof.com/manufacturers/zurn/) - [Smith](https://www.hy-techroof.com/manufacturers/j-r-smith/) - [Josam](https://www.hy-techroof.com/manufacturers/josam/) - [Wade](https://www.hy-techroof.com/manufacturers/wade/) - [Marathon](https://www.hy-techroof.com/manufacturers/marathon/) - [Olympic](https://www.hy-techroof.com/manufacturers/olympic/) - [Equipment](https://www.hy-techroof.com/products/equipment) - [Garlock](https://www.hy-techroof.com/manufacturers/garlock/) - [Leister](https://www.hy-techroof.com/manufacturers/leister/) - [All Seasons / Grizzly](https://www.hy-techroof.com/manufacturers/all-seasons-equipment/) - [Hennes-Johnson](https://www.hy-techroof.com/manufacturers/hennes-johnson/) - [Gator](https://www.hy-techroof.com/manufacturers/gator-roofing-equipment/) - [Roofmaster](https://www.hy-techroof.com/manufacturers/roofmaster-products-company/) - [Safety](https://www.hy-techroof.com/products/safety) - [Leading Edge](https://www.hy-techroof.com/manufacturers/leading-edge-safety/) - [Tie Down Manufacturing Ingenuity](https://www.hy-techroof.com/manufacturers/tie-down-manufacturing-ingenuity/) - [Malta Dynamics](https://www.hy-techroof.com/manufacturers/malta-dynamics/) - [Resources](https://resources.hy-techroof.com) - [Account](https://www.hy-techroof.com/login.php) - [The Drain Wizard](https://resources.hy-techroof.com/ask-the-drain-wizard) - [FAQ](https://resources.hy-techroof.com/faq) - [Blog](https://resources.hy-techroof.com/blog) - [Roof Drain Specs](https://resources.hy-techroof.com/roof-drain-specs-and-diagrams) - [Video Library](https://resources.hy-techroof.com/video-library) - [About](https://www.hy-techroof.com/about-hy-tech/) - [Contact Us](https://www.hy-techroof.com/contact-hy-tech/) - [About Hy-Tech](https://www.hy-techroof.com/about-hy-tech/) - [Service and Repairs](https://www.hy-techroof.com/service-and-repairs/) [800-635-0384](tel:8006350384) **Hy-Tech Products **10035 Broadview Road, Broadview Heights, OH 44147 [info@hy-techroof.com](mailto:info@hy-techroof.com) [800-635-0384](tel:8006350384) **Hy-Tech Products **10035 Broadview Road, Broadview Heights, OH 44147 [info@hy-techroof.com](mailto:info@hy-techroof.com) © 2026 Hy-Tech Products, Inc. All rights reserved. [ Terms of Use ](https://resources.hy-techroof.com/terms) - -