This replacement O-Ring is designed exclusively for Pentair 5" Diverter Valves featuring a cap width of 4 3/4". Please note that this diverter series is being phased out by the manufacturer, which means replacement components are becoming increasingly scarce. Complete valve assemblies and limited individual parts remain the only available options as inventory diminishes.
Additional sealing components for this cap assembly include the undercap gasket and stem O-rings (O-643), which are sold separately and available while supplies last.
COMPATIBILITY WARNING: This O-Ring is NOT compatible with 2" diverter valves from Waterway, Hydro-Air, or CMP that have cap measurements between 3 11/16" and 3 3/4". Verify your cap width before ordering to ensure proper fitment.