Fluidra - Sand Filter Lid O-Ring for Cantabric & Millennium Filters

Fluidra – Sand Filter Lid O-Ring for Cantabric & Millennium Filters

This is the genuine Fluidra (AstralPool) replacement O-ring designed to seal the joint between the filter body and the upper transparent lid on Cantabric and Millennium sand filters. It is a critical sealing component that prevents water leaks at the top of the filter housing. If your filter is weeping or dripping water around the lid area, a worn or pinched O-ring is the most common cause.

Compatibility

This O-ring is compatible with a wide range of AstralPool sand filters, including the Cantabric Top (Ø400, 500, 600 and 750 mm), Cantabric side-outlet models (Ø400–750 mm), the Millennium Top outlet, and Millennium side-outlet models (Ø380–660 mm). It is also suitable for AstralPool stainless steel filters (Ø350–600 mm). Always verify your filter’s model reference against the compatibility list before ordering.

Why Genuine Matters

As an original Fluidra spare part, this O-ring is manufactured to the exact tolerances of the filter lid groove, ensuring a reliable, long-lasting seal. Aftermarket alternatives may not match the precise cross-section or material specification, risking premature failure or continued leaks. Using a genuine part also keeps your filter warranty intact.

Installation

When fitting the new O-ring, ensure the groove in the filter lid is clean and free of debris or old sealant. Seat the O-ring evenly around the full circumference and avoid twisting or pinching it during reassembly. Applying a thin coat of silicone-based lubricant will help it seat correctly and extend its service life.