Contains six (6) H-553 O-Rings (also go by Sloan part numbers H553 and 5308696, Zurn part number P6000-C31, and American Standard part number A912809-0070A).
For use with Sloan Royal and Regal as well as Zurn and American Standard flush valves.
Fits into a groove on the Flushometer tailpiece that slides into the control stop to create a water-tight seal. Recommended to replace the o-ring each time you loosen the connection to ensure a leak-proof seal.
The H-553 o-ring measures approximately 1-3/8” outside diameter.