Impeller for Hagen Fluval 404 aquarium filter (model 19676)

Replacement impeller for the Hagen Fluval 404 aquarium filter (model 19676). This mechanical rotor fits into the Fluval 404's pump housing to restore water flow and maintain filtration efficiency in both freshwater and marine aquarium systems. Designed as a maintenance and repair part, the impeller reduces vibration and noise caused by worn or damaged rotors and helps recover original pump performance when correctly installed.

Advantages

The impeller is made to match the original Hagen Fluval 404 specifications, providing compatible dimensions and balanced rotation for smooth operation. Using a correctly fitted impeller reduces mechanical noise, lowers the risk of further wear on the motor shaft and bearings, and contributes to consistent water circulation. As a direct replacement part, it simplifies routine upkeep and extends the usable life of the filter without requiring full pump replacement.

Suitable for

• Maintenance and repair of Hagen Fluval 404 aquarium filters
• Restoring pump flow in freshwater tanks
• Restoring pump flow in marine or saltwater aquaria
• Reducing vibration and operational noise from worn rotors

Key specifications

• Compatible model: Hagen Fluval 404
• Function: Mechanical impeller / rotor for internal pump
• Material: engineered plastic rotor and magnetic or metal shaft assembly (as per original design)
• Intended use: replacement part for restored water circulation and filtration performance
• Environment: suitable for freshwater and marine aquarium use

How to use

Turn off and unplug the Fluval 404 filter before disassembling the pump housing. Remove the impeller cover and extract the old impeller gently to avoid damaging the shaft or housing. Inspect the pump cavity for debris and clean as needed. Insert the replacement impeller in the same orientation as the original, reassemble the cover and housing, then reconnect power and confirm proper rotation and flow. Follow the filter manufacturer's service instructions and safety precautions during the procedure.

Usage recommendations

Verify compatibility with Hagen Fluval 404 before purchase. Regularly inspect and clean the impeller and pump chamber every few months or sooner if flow decreases. Replace the impeller if blades are chipped, the shaft is corroded, or noise persists after cleaning. Use genuine or correctly specified parts to maintain filter performance and avoid voiding any warranties.