Josam 21500-16: Large Sump with Internal Waterguard
Dimensional data is subject to manufacturing tolerances and change without notice.
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| Type No. | Pipe Size (in.) | Weight (lbs.) |
| 21502-16 | 2 | 41 |
| 21503-16 | 3 | 42 |
| 21504-16 | 4 | 43 |
| 21505-16 | 5 | 44 |
| 21506-16 | 6 | 45 |
Specifications: The Josam 21500-16 Series is a coated cast-iron roof drain with a large polypropylene locking dome. Includes a WEJLOC® non-puncturing clamp ring with integral gravel stop, secured plastic internal waterguard for 3-in. water depth, and a large sump with a wide roof flange and bottom outlet.
Application: Can be used on roofs of any size or construction where constant flooding is required at a predetermined water depth. It may also be used on conventional roofs as a safety overflow, which receives water only when the build-up is greater than the height of the standpipe. A large slotted dome ensures maximum free area for quick rainwater drainage while protecting the drain sump and connected piping from debris. Its WEJLOC® compression-flashing clamp holds the membrane or flashing securely to the drain body.
Outlet Types
| Threaded Outlet (-T) |
| Inside Caulk Outlet (-X) |
| Hub Outlet w/ Gasket (2-4 in.) (-Y) |
| No-Hub Spigot Outlet (-Z) |
Options
| 2 in. High Solid Clamping Collar (-17) |
| Secondary Flashing Clamp (use with -AE only) (-4) |
