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Hayward

Hayward W3PHS41CST AquaNaut 400 Suction Pool Cleaner for In-Ground Pools up to 20 x 40 ft. (Automatic Pool Vacuum)

  • Based on 1,334 reviews
Condition: New
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This item's return window has been extended for the holiday season: Returnable until Jan 31, 2026

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Availability: In Stock.
Fulfilled by Doheny's Pool Supplies Fast
Arrives Friday, Dec 19
Order within 15 hours and 37 minutes
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Style: 4-Wheel


Features

  • The Hayward AquaNaut 400 Suction Cleaner features an exclusive 4-wheel drive capability for superior power, traction and stability in pools of all kinds
  • Patented V-Flex technology with self-adjusting variable vanes maximizes suction power while virtually eliminating clogs
  • Multiple pre-programmed steering sequences ensure end-to-end coverage, including walls
  • Patented rugged tire treads provide superior climbing power and maneuverability on all surfaces
  • Patented adjustable roller skirt never loses suction on uneven surfaces

Description

Featuring an exclusive 4-wheel drive capability, the Hayward AquaNaut 400 Suction Cleaner offers superior power, traction and stability for end-to-end cleaning in pools of all kinds. its patented V-Flex™ technology with self- adjusting variable vanes maximize suction power while virtually eliminating clogs. AquaNaut 400 expertly navigates any surface while maintaining optimal suction, even when encountering tough obstacles and large debris—and its patented rugged tire treads provide superior climbing power and maneuverability on surfaces like concrete, gunite, vinyl, fiberglass, tile and pebble. An advanced design optimizes AquaNaut’s flow performance, making it the perfect partner for variable-speed pumps. Ideal for larger in-ground pools up to 20 x 40 ft. and pools with deep ends, AquaNaut 400 provides a powerful corner-to-corner clean without clogging or getting stuck

Brand: Hayward


Model Name: W3PHS41CST


Material: Vinyl


Color: Blue


Product Dimensions: 40.4"L x 13.6"W x 11.9"H


Power Source: Hydraulic Powered


Item Weight: 21.2 Pounds


Hose Length: 40 Inches


Special Feature: 4-wheel drive, enhanced suction power with patented V-Flex technology, pre-programmed steering sequences, and rugged tire treads for superior climbing


Assembly Required: No


Control Method: Touch


Warranty Type: Limited


Efficiency: Efficient


Product Care Instructions: Rinse and clean after each use, occasionally disassemble and clean internal components; consult user manual for specific instructions.


Installation Type: Self-Installation


UPC: 610377389969


Global Trade Identification Number: 69


Product Dimensions: 40.4 x 13.6 x 11.9 inches


Item Weight: 21.2 pounds


Manufacturer: Hayward


Item model number: W3PHS41CST


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Friday, Dec 19

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews

    • Great Cleaner. Better Than The Hayward Ultra Vac It Replaced
Style: 2-Wheel
So we have been using the Hayward Ultra Vac and in years past the Hayward Navigator. I bought the parts (A Frame, Pods, Turbine, Rubber Feet, etc) and it cost me about $100 for all that. In the past, it was easy and the unit worked after I replaced the parts. This time it didn't (not sure if I did something wrong but I'm tired of rebuilding everything). The parts wear out pretty darn quickly as it runs everyday in our pool. Now..enter the new Hayward Aquanaut 2 wheel drive cleaner. It has a turbine with adjustable size flaps for larger debris to enter without clogging. Much simpler workings inside and the really only part that looks like it will need regular replacing is the set of rubber tires that I think cost about $15 a set. I hooked it up tonight and our pool was covered in leaves. In just one hour, most were gone and in the large leaf canister (Hayward) inline on the new Aquanaut cleaner. I tried going with a different brand/model based on reviews and the Barracuda G3 I purchased was complete garbage. Got stuck in corners, passed over leaves and didn't pick them up...not good at all. The Hayward Ultra Vac was about $379 and this 2 wheel Aquanaut was $449. For the difference, I'm guessing it will be easier to maintain and it did a fantastic job of cleaning our pool t his evening. The 4 wheel is probably great too but recommended for larger pools with a deeper deep end (ours is only about 6 feet deep). The steering on the Aquanaut is great as it seems to randomly cover every square inch of our pool. The tires have a nubby that sticks out on each one that helps ensure it won't get stuck at a corner or on a drain that sticks up in the deep end. It also covers well both deep and shallow end of our pool ( I see so many complaints about cleaners that stay in one area only...not so here). Yes it's more than I expected to spend but it works great. I highly recommend this cleaner. Great for leaves. ... show more
Reviewed in the United States on April 14, 2022 by Win2000
    • This robot cleans my pool
Style: 2-Wheel
Review Image by Alex Meyerhoff Alex Meyerhoff
Recommended by my Poolman to make his life easier. Works every day. Never calls in sick. Great cleaning ability. Good value for the money. Climbs walls. I’m pleased with lifespan of this product. Comes with easy to use instructions. I love having robots that do the hard work.
Reviewed in the United States on September 27, 2025 by Alex Meyerhoff Alex Meyerhoff
    • Significant improvement over Navigator, don't forget the rebate
Style: 4-Wheel
After putting the tubes together and dropping this 4-wheel model in the pool without reading a thing, it worked well so I can say that it is almost me-proof. I only read the directions because it didn't climb the walls, which is why I purchased it over the 2-wheel model (reviews seemed to suggest the 4-wheel climbed better). The directions explained that the two floats weren't in the correct positions "out of the box" so I moved them up, and that the "throat" on the bottom can be replaced with larger or smaller ones, which I did (large for me). I'm not getting the ideal RPMs on the wheels and it still isn't climbing, but to be frank our pool equipment is about 20 years old and is pretty beat up. So, it may be time for a new pump, since this seems to be running perfectly. Our old Navigator stopped climbing walls, too, about five years ago. This one gets to every corner of the pool and does NOT fall on its side like others have complained. We have a normal semi-rectangular 15' x 30' pool with an 8' deep end, and of course all the tubes weren't necessary; I'm using all but four. It also climbs over the bottom drain covers although they do slow it down. So, it's working well except for the climb. I'm hoping that some general pump and system maintenance will improve the speed and climbing, but at least it works better than our four-year old Hayward Navigator - it is faster and doesn't get stuck on the bottom drains. Otherwise, I would recommend either product with the edge to the newer Aquanaut. I almost forgot - Hayward has ongoing $100 rebate cycles. Some reviews say the rebate is legit while others say it didn't work for one reason or another. I read the rules and didn't see any reason why they wouldn't honor it, so applied. YMMV. ... show more
Reviewed in the United States on May 7, 2020 by MikeInWeston
    • Good Cleaner so long as there are no USER ERRORS.
Style: 4-Wheel
I purchased this 6 months ago. For 6 months I was a tad frustrated. It kept falling over onto its side and wasn’t cleaning the pool very well; it was simply recirculating the water 80% of the time. HOWEVER, after being frustrated for 6 months I suddenly realized that it was MY FAULT; USER ERROR. I failed to place the hose sleeves that are meant to go just above the cleaner on the hose. Once I realized this and went and found them in the box. I clipped one about 6 inches above the cleaner and the second one 4-6 inches above the first one. After I had put them where they belong, my cleaner suddenly stopped falling over on its side and started working great!!! I have noticed that there are several other reviews where people are claiming the same issue with the cleaning falling over, some with pictures of the cleaner on its side; most of which also show the lack of the hose sleeves properly placed, which leads me to think that I’m not the only person making this error. Now that it’s properly installed, it’s working great and has yet to fall over even one time. ... show more
Reviewed in the United States on April 27, 2023 by DCZ

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