Fluidra – 2" Union Fitting with Concave Gasket for DV Sand Filter

Fluidra – 2″ Union Fitting with Concave Gasket for DV Sand Filter

This genuine Fluidra kit includes a 2″ union connector and its matching concave face gasket, designed to create a leak-free pipe connection on Astral DV-series sand filters. The concave gasket seats perfectly against the union face, compressing evenly under tightening to form a reliable, pressure-resistant seal. It is the correct OEM replacement for worn, cracked, or leaking union fittings on the filter’s plumbing ports.

Compatibility

This fitting kit is designed for the Astral DV-800 T/C/NG RED sand filter range within the Fluidra / AstralPool product family. The Fluidra spare-parts portal also lists this SKU as applicable to several other DV-series filter models. Always cross-reference your filter’s model number and exploded-view diagram before ordering to confirm fitment.

Why Genuine Matters

As an OEM Fluidra part, this union and gasket are manufactured to the exact tolerances of the original assembly, ensuring the concave gasket mates correctly with the union face without gaps or uneven compression. Aftermarket substitutes may differ in seating profile or material hardness, leading to premature leaks — particularly under the cyclic pressure changes of normal filter operation.

Installation

Isolate the pump and filter, and fully drain the system before removing the old union. Clean both mating faces to remove any debris or old gasket residue, then seat the new concave gasket and hand-tighten the union before applying a final quarter-turn with a strap wrench. Do not over-torque, as this can distort the gasket and reduce sealing performance. A competent pool technician should carry out the work if you are unfamiliar with filter plumbing.