Replacement cast iron drain ring for the Watts RD-100 and RD-300 Roof Drain.
For instructions on how to measure for a replacement drain ring, visit our resource page, How to Measure a Roof Drain Ring.
This ring is 4 bolt and has closed bolt holes located outside of the gravel stop.
- Outside diameter: 15-1/2"-in. [13"-in. outside gravel stop]
- Bolt-to-Bolt diameter: 13-7/8"-in. at 180 Degrees.
- Casting#: B15-FLG