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Dimensional data is subject to manufacturing tolerances and change without notice.
Specifications: The Josam 21500-IRMA-6 Series is a coated cast-iron roof drain with a large polypropylene locking dome, dome support ring and perforated stainless steel extension filter. Includes a WEJLOC® non-puncturing clamp ring and large sump with an extra-wide roof flange and bottom inside caulk connection outlet.
Application: Used on roof systems where an "insulated membrane assembly"—also known as an "inverted membrane assembly"—is specified. Insulation is installed on top of a waterproof membrane, and then gravel ballast is applied over the insulation. The drain is furnished with a perforated stainless steel extension made to the specified height of the insulation combined with the depth of the ballast. 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. An extra-wide deck flange provides positive support and a large bonding survace for liquid applied membranes.
| Type No. | Pipe Size (in.) | Weight (lbs.) |
| 21502-IRMA-6 | 2 | 77 |
| 21503-IRMA-6 | 3 | 78 |
| 21504-IRMA-6 | 4 | 79 |
| 21505-IRMA-6 | 5 | 80 |
| 21506-IRMA-6 | 6 | 81 |
