Fluval Magnetic Impeller with Curved Fan Blades for 404 External Canister Filter – Original Series

The Fluval Magnetic Impeller with Curved Fan Blades is a genuine replacement impeller designed specifically for the original series Fluval 404 external canister filter — the version manufactured before the later straight blade redesign.

The impeller is the rotating magnetic component at the heart of the filter motor head — it generates the water flow that drives all filtration through the filter media. When the impeller becomes worn, chipped, or damaged, the filter can develop reduced flow, increased noise, vibration, or stop circulating water altogether. Replacing with a genuine Fluval curved blade impeller restores smooth, efficient water circulation and full filter performance.

Important note on blade type: The Fluval 404 was produced in two versions — an original series with curved fan blades and a later series with straight fan blades (A20172). This listing is for the curved blade version only — compatible with original series 404 filters. If your filter has straight fan blades, order A20172 instead.

Key Features

• Genuine Fluval replacement part: Original series curved blade magnetic impeller for the Fluval 404 external canister filter
• Curved fan blade design: Original style impeller for early production Fluval 404 filters — not interchangeable with straight blade impellers
• Magnetic impeller: Strong magnetic coupling between motor and impeller for powerful, efficient water movement
• Restores full pump flow: A worn or chipped impeller is the most common cause of reduced flow and increased filter noise — replacement restores full rated performance
• Reduces noise and vibration: A correctly fitted impeller eliminates rattling and vibration caused by worn or damaged components
• Easy to install: Simple component swap during routine filter maintenance — no specialist tools required
• Note: Impeller only — shaft not included. Order the curved blade shaft assembly separately if also worn

Compatibility

• Compatible with: Fluval 404 External Power Filter (A215) — original series with curved fan blades only
• Not compatible with: Later production 404 with straight blades, Fluval 405, 406, or other Fluval canister filter models
• Blade type: Curved fan blades

Product Details

• Brand: Fluval
• Type: Magnetic Replacement Impeller — Curved Fan Blades
• Compatibility: Fluval 404 (A215) — original series, curved blade models only
• Shaft included: No — order separately if required
• Quantity: 1 impeller

This impeller is suitable for any aquarium keeper running an original series Fluval 404 external canister filter who needs to replace a worn or damaged curved blade impeller and restore quiet, efficient filter performance.