The Pentair Sta-Rite System 3 Gauge Manifold O-Ring (35505-1423) is a Manifold O-Ring Replacement. This O-Ring is a piece of the Filter Valve Gauge and Assembly (Sold Separately). Fits the Pentair Sta-Rite models S7M120, S7M400, S8M150, S8M500, S7D75, S8D110, S8S70, S7S50, PTM50, PTM70, and PTM100.


  • Adapter Bushing Replacement.
  • Connects to Filter Top and Bushing (Sold Separately).