Davey - Crystal Clear ER 225/270 Filter Lid O-Ring - 33381

Davey – Crystal Clear ER 225/270 Filter Lid O-Ring

This is the genuine Davey replacement lid O-ring for the Crystal Clear ER 225 and ER 270 series cartridge filters. Seated between the filter tank body and its lid, this O-ring forms the pressurised watertight seal that prevents leaks during normal filtration. It is a routine service item typically replaced when the filter develops a lid-area leak, the seal shows visible wear or cracking, or after an extended season of use.

Compatibility

This O-ring is designed specifically for the Davey Crystal Clear ER 225 (DCC225) and ER 270 (DCC270) cartridge filter models. Always verify your filter model number before ordering, as Davey produces several cartridge filter ranges — each with its own specific lid seal. Using the incorrect O-ring can result in leaks or damage to the lid seating surface.

Why Genuine Matters

A genuine Davey O-ring is manufactured to the exact tolerances required for the Crystal Clear ER tank and lid assembly. Third-party seals may not match the correct cross-sectional diameter or material rating, risking premature failure under pool water pressure and exposure to chlorinated water. Fitting a genuine part ensures the lid seals correctly and maintains the filter’s operating integrity.

Installation

Before fitting, switch off the pump and fully relieve system pressure. Remove the old O-ring, clean the groove thoroughly, and apply a thin film of 100% silicone lubricant to the new O-ring before seating it. Do not use petroleum-based lubricants, as these degrade rubber seals. Refit the lid, tighten the locking ring, and check for leaks on first start-up.