---
title: Watts RD-100-SO Side Outlet Roof Drain Specs
description: The Watts Drainage RD-100-SO is an epoxy-coated, cast-iron side outlet roof drain with flashing clamp.
---

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# Watts RD-100-SO Side Outlet Roof Drain Specs

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

![watts-rd-100-so](https://resources.hy-techroof.com/hs-fs/hubfs/watts-rd-100-so.png?width=472&name=watts-rd-100-so.png)

**Specifications**: The Watts Drainage RD-100-SO is an epoxy-coated, cast-iron side outlet roof drain with flashing clamp. It includes an integral gravel stop; self-locking polyethylene dome; and no hub (standard) outlet.

| **Pipe Size (in.)** | **A** | **B** | **C** |
| --- | --- | --- | --- |
| 2" (-2) | 4-5/8 in. | 8-7/8 in. | 15-15/16 in. |
| 3" (-3) | 4-3/32 in. | 7-3/8 in. | 14-7/16 in. |
| 4" (-4) | 3-5/8 in. | 5-5/8 in. | 12-11/16 in. |

 

### Outlet Types

- No-Hub Outlet (-NH)
- Push On (-P)
- Threaded Outlet (-T)
- Inside Caulk (-X)

### Accessories

- Galvanized Body and Flashing Clamp (-13)
- Ductile Iron Low Dome (4-in.) (-K40)
- Accutrol Flow Restrictor (-A)
- Aluminum Dome (-K80)
- Sump Receiver (-B)
- Rough Bronze Dome (-K81)
- Underdeck Clamp (-D)
- SS Mesh Covered Dome (-K83)
- Stainless Steel Ballast Guard (-GSS)
- Vandal Proof Dome (-L)
- Ductile Iron Dome (-K)
- 2-in. External Water Dam (-R)
- Galvanized Dome (-K13)
- Adjustable Internal Water Dam (-W)

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