There is a small dimple in the pads on this ring, the Bolt-to-Bolt dimensions are taken from the center of the dimple at 180 Degrees.
- Outside diameter: 13-1/2"-in. (may vary from 13"-in. to 13-1/2"-in.)
- Bolt-to-Bolt: 10-1/2"-in. (pads, not bolt slots) at 180 Degrees.
- Casting#: 010350
For instructions on how to measure for a replacement drain ring, visit our resource page, How to Measure a Roof Drain Ring.