Fluval FX Purge Valve
The Fluval FX Purge Valve is a replacement part for the Fluval FX series of external filters, which are designed for high-performance aquarium filtration. The purge valve helps to empty the canister and perform seamless water changes without disturbing your setup or tank inhabitants. The purge valve is compatible with the Fluval FX4, FX5, and FX6 models.