The Pentair Sta-Rite System 3 Bulkhead O-Ring - Into Tank (35505-1425) is a direct Bulkhead O-Ring Replacement. This is designed specifically for the O-Ring leading into the Tank. Fits the Pentair Sta-Rite models S7M120, S7M400, S8M150, S8M500, S7D75, S8D110, S8S70, S7S50, PTM50, PTM70, and PTM100.


  • O-Ring Replacement.
  • Inner Bulkhead O-Ring Only.