This O-Ring Fits Pentair Diverter Valves Only that measures 4 3/4" Wide Cap. This Diverter is becoming obsolete So all individual parts are not available and at some point none with be available that is why you only see a few parts for this valve or a complete valve.
If you need the other O-rings or gaskets for this cap click these links..
Undercap Gasket, Pentair, Diverter Valve, Cap, for Pentair 5" Diverters Only
2x Small O-Rings, Pentair, Diverter Valve Stem, O-643 for Pentair 5" Only
NOTE: THIS O-RING DOES NOT FIT A 2" Waterway, Hydro-Air or CMP 2" Valve that has a cap that measures between 3 11/16 and 3 3/4".
