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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
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Availability: In Stock.
Fulfilled by BackyardPoolSuperstore
Arrives Sunday, Mar 22
Order within 12 hours and 30 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: Sunday, Mar 22

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

    • Very effective
Style: 2-Wheel
Absolutely blown away by this thing. I’ve have a g3 barracuda I’ve been using for 10yrs now. It did a decent job and was way better than vacuuming manually. I left it in the pool 24/7 and depending on the time of year had it running several hrs a day. Pool would be decent but struggled with leaves and pine needles especially in fall and winter here in FL. Over the last 10yrs the trees behind my property line have grown and throw way more leaves and pine needles in my pool every year and the barracuda struggles more and more, constantly getting clogged and not working. Got my aquanaut 2 days ago hooked it up, dialed it in as close as I could to the correct rpm. This thing is a beast just sucking up everything within a few hours it had my filthy pool almost spotless. I have a zodiac leaf canister hooked up as well and had to dump it 4-5 times as well as the cleaner got jammed up with debris a few times in the hrs it ran. While the cleaner did get clogged I don’t fault the cleaner as my pool was an absolute mess with leaves, pine needles, bark and some small sticks, that is beyond anything the aquanaut is advertised to do and directions say to clean out large debris prior to using the aquanaut. No that the pool is clean I have no doubt it will run flawlessly without getting clogged. I did have to run my Hayward variable speed pump almost 300rpm higher to achieve the correct rpm on the aquanaut. At first I’d did not like this as it pulls almost 200w more power but from the looks of it I will be able to drastically cut down the hrs of cleaner time. I was running my barracuda cleaner 4hrs a day and looks like I will be able to run the aquanaut under 2hrs which will save a few $ over the yrs of use. One thing I wish I had researched was the big difference between the 2 wheel vs 4 wheel version being the 4 wheel does longer straight aways before turning aka for larger pools. I thought the 4 wheels was more for climbing and traction from deep end to shallow. Again not the cleaners vault it’s mine but the good news is they make the gear to gain that ability for the 2 wheel and it’s on like $13. ... show more
Reviewed in the United States on January 16, 2024 by Jonb
    • 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
    • Works ok
Style: 4-Wheel
Have not had an issue with it turning on its side. It does not climb the vertical walls no matter the settings but does climb the steep sides of the bowl. It does not sweep completely clean. I still have to brush dirt spots. It will NOT remove algae. You will have to brush everything loose. It takes about 5 to 6 hours for it to get everything covered. My pool is 16 x 32 and 5 feet at the deep end. It does climb onto the standard circular bottom drain and makes all 4 wheels free spin making it stuck so you have to watch it. While it does kind of free you from vacuuming, it does require tending to. I mean, I can vacuum the entire pool in about 20 minutes manually so this doesn't save any time, just saves a little muscle. Is it worth the price? Maybe a break even if it lasts more than 2 to 3 years, otherwise, it won't be worth it. ... show more
Reviewed in the United States on April 8, 2023 by New Dayer
    • Finnly found the right product
Style: 4-Wheel
I have pool plaster that's 47 years old. I had the creepy Crowley before, which caused extensive damage to my pool steps. I kept trying to find a pool cleaner that would not scrape the pool plaster. I finally found the right one. The rubber on the wheels is soft and does not scrape the plaster. It works great; however, it does not go up the walls or the steps as which I like. In turn, I have to brush the walls down and the steps. It does not take long. I am very happy with the product. ... show more
Reviewed in the United States on September 8, 2025 by Emanuel

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