Description
Genuine replacement O-ring pair designed specifically for Pentair diverter valve stems with 4 3/4" wide caps. Part number O-643. These sealing rings are compatible exclusively with Pentair 5" diverter valves. Please note that this diverter valve model is being phased out, resulting in limited parts availability—complete valve assemblies and select components only remain in stock. IMPORTANT COMPATIBILITY WARNING: These O-643 O-rings are NOT compatible with 2" Waterway, Hydro-Air, or CMP 2" valves featuring caps measuring between 3 11/16" and 3 3/4". Verify your valve cap measures 4 3/4" wide before ordering to ensure proper fit.
