Hayward AquaNaut 400 4-Wheel Drive Suction Pool Cleaner

Hayward AquaNaut 400 (W3PHS41CST) is a 4-wheel drive suction automatic pool cleaner for inground pools up to 20 x 40 ft, including pools with deep ends. Patented V-Flex variable vane turbine eliminates clogs and maximizes power at virtually any flow. Multiple pre-programmed steering sequences cover floors, walls, and coves. Requires 1/2 HP pump or 35 GPM minimum. No booster pump required. Includes 40 ft of hose.

• SKU: W3PHS41CST
• 2-year limited warranty (parts)
• Cleans pools up to 20 x 40 ft, including pools with deep ends
• 4-wheel drive; maintains maximum power and balance in larger pools and pools with deep ends
• Patented V-Flex variable vane turbine: vanes self-adjust to allow large debris passage and maximize suction power at virtually any flow; ideal for use with variable-speed pumps
• Multiple pre-programmed internal steering sequences for complete coverage of floors, walls, and coves; turns every 11 to 14 ft
• Patented robust tire treads for superior climbing power and obstacle maneuverability
• Patented adjustable roller skirt maintains optimal suction on uneven surfaces and around obstacles
• Three interchangeable throats for optimized suction at different flow rates and variable-speed pump compatibility
• Connects to dedicated suction port or skimmer; no booster pump or separate electrical connection required
• Minimum pump size: 1/2 HP or 35 GPM
• Includes 40 ft of hose
• Weight: 19 lbs
• Compatible with concrete, gunite, vinyl, fiberglass, tile, and pebble pool surfaces (optional tape tires may be required for smoother fiberglass and tile surfaces)
• Note: wall climbing capability may be affected by specific pool shapes and surfaces; the cleaner may not climb the wall under all conditions

Hayward AquaNaut 400 Automatic Pool Cleaner: 4-Wheel Drive and V-Flex Turbine for Larger Inground Pools

The AquaNaut 400 is Hayward's 4-wheel drive suction cleaner for larger inground pools and pools with deep ends. All four wheels are driven simultaneously by the patented V-Flex turbine, which self-adjusts to allow large debris passage and maintain maximum suction power at virtually any pump flow rate, including variable-speed pump speeds. Multiple pre-programmed internal steering sequences ensure thorough coverage of floors, walls, and coves without the owner needing to intervene. Three interchangeable throats allow further optimization for different pump sizes and speeds. No booster pump required. The cleaner connects to the existing pool pump through the dedicated suction port or skimmer.

AquaNaut 400 vs. AquaNaut 200: When the 4-Wheel Version Is the Right Choice

The AquaNaut 200 is designed for average-sized pools up to 16 x 32 ft. The AquaNaut 400 is built for larger pools up to 20 x 40 ft and pools with deep ends, where 4-wheel drive provides the extra traction and balance needed to pull the longer hose and maintain consistent performance across the full pool. Both share V-Flex turbine technology, pre-programmed steering, robust tire treads, adjustable roller skirt, and three interchangeable throats. The 4-wheel drive earns its additional cost in larger pools and pools with deep ends that challenge 2-wheel traction.

Hayward AquaNaut 400 Suction Pool Cleaner Specifications

Hayward AquaNaut 400 Frequently Asked Questions

What is the practical difference between the AquaNaut 400 and the AquaNaut 200?

The AquaNaut 200 is designed for average-sized pools up to 16 x 32 ft. The AquaNaut 400 is built for larger pools up to 20 x 40 ft and pools with deep ends, where 4-wheel drive provides the extra traction and balance needed to maintain consistent performance with the longer 40 ft hose. Both share the same V-Flex turbine, pre-programmed steering, tire treads, roller skirt, and three interchangeable throats.

Will the AquaNaut 400 climb pool walls?

The AquaNaut 400 is designed to cover floors, walls, and coves. However, wall climbing capability may be affected by specific pool shapes and surfaces, and the cleaner may not climb walls under all conditions. Performance on smooth fiberglass or steep wall sections may require optional tape tires for best results.

Does the AquaNaut 400 work with variable-speed pumps?

Yes. The V-Flex variable vane turbine is specifically designed to maximize suction power at virtually any flow rate, making it well suited for variable-speed pump installations. The three interchangeable throats allow further optimization for different pump speeds.

What surfaces is the AquaNaut 400 compatible with?

Concrete, gunite, vinyl, fiberglass, tile, and pebble. Optional tape tires may be required for smoother fiberglass and tile surfaces to maintain optimal traction.

My AquaNaut 400 climbs part way up the wall but does not reach the waterline. What should I check?

First confirm all four wheels are turning at consistent speed and that the pump is running at or above the 1/2 HP or 35 GPM minimum. Inspect the wheel treads for wear — a worn tread on one side creates a traction imbalance that limits climb height. Confirm no hose sections are kinked. If the pool surface is smooth fiberglass or tile, optional tape tires may improve wall traction.