O-Ring for the following Pumps:
- WhisperFlo Pumps Manufactured Before June 1994
- Pumps manufactured before November 1998 require a volute replacement kit (357149) when replacing items no. 9-gasket, no. 10-volute, or no.18-seal plate. This kit will update the pump to the new configuration using the "Cam and Ramp" lid design.