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Hayward

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

  • Based on 1,334 reviews
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Availability: In Stock.
Fulfilled by BackyardPoolSuperstore
Arrives Jun 26 – Jun 27
Order within 12 hours and 56 minutes
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Style: 4-Wheel


Features

  • DIRT AND DEBRIS CANNOT HIDE: Unlike other inground pool vacuum cleaners, Hayward AquaNaut's patented V-Flex turbine eliminates clogs and delivers power at any flow; roller skirts keep suction on uneven surfaces; ideal for variable speed pool pumps
  • EASY TO USE: No complicated instructions! Simply attach it onto your pool's suction port or skimmer; the suction pool cleaners are ready, no booster pump required
  • UNSTOPPABLE PERFORMANCE: The patented tire treads on the AquaNaut in ground pool vacuum cleaner give this pool vac enhanced climbing ability and obstacle maneuverability - especially with main drains
  • HIGHLY MANEUVERABLE: This inground pool vacuum cleaner, among pool cleaners for inground pools, has multiple pre-programmed internal steering sequences, which cause the left wheel to periodically reverse, allowing AquaNaut to cover it completely

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: AquaNaut


Material: Vinyl


Color: Blue


Product Dimensions: 13.4"L x 11.1"W x 8.3"H


Power Source: Hydraulic Powered


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


Control Method: Touch


Efficiency: Efficient


Load Capacity: 5 Pounds


Required Assembly: No


Warranty Type: Limited


Installation Type: Self-Installation


Material Type: Vinyl


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


Color: Blue


Item Dimensions L x W x H: 13.4"L x 11.1"W x 8.3"H


Item Weight: 6.6 Pounds


Hose Length: 40 Inches


Brand Name: Hayward


Model Name: AquaNaut


UPC: 610377389969


Global Trade Identification Number: 69


Manufacturer Warranty Description: 1-year.


Manufacturer Part Number: W3PHS41CST


Model Number: W3PHS41CST


Unit Count: 1.0 Count


Item Type Name: Pool Cleaner


Manufacturer: Hayward


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Jun 26 – Jun 27

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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Similar Products

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
    • Long lasting
Style: 4-Wheel
Review Image by Wayne
This thing is perfect . Cleans good works great with variable speed pump . Seem reliable and not a lot of moving parts , was looking at those new cleaners but stuck with the old fashion one that will last
Reviewed in the United States on March 23, 2026 by Wayne
    • 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
    • Effective pool cleaner
Style: 4-Wheel
Expensive price but great quality. No issues with it to date
Reviewed in the United States on December 7, 2025 by AZ Customer
    • Worked until just after the return window.
Style: 2-Wheel
I HAD a Poolvergneugen, which is what this product used to be before it was procured by Hayward. That Poolvergneugen worked reliably for many years. I loved my Poolvergneugen. The old Poolvergneugen started jamming up at the end of last year, where the wheels simply would not turn. We replaced the drive train, but it jammed up again after like 3 months. When they replaced the drive train for the third time, my confidence in the machine was shattered, which broke my heart. It was old. I suppose it's bound to happen. I decided to buy another Poolvergneugen, but discovered that the company had been procured by Hayward pools. Hayward is a great brand. I have a Hayward pool pump and a Hayward DE filter and they have run reliably for years, like my old Poolvergneugen. I didn't hesitate to order the Hayward Aquanaut 200 expecting the same quality I expect from such a powerful marriage as Hayward and Poolvergneugen. I installed the Aquanaut and was immediately impressed with its impressive suction. For a while my pool was cleaner than it had ever been. Suddenly this week, not two full months after purchase, I woke up and saw a thick layer of desert sand all over the bottom of my pool. The Aquanaut was on, but it wasn't moving. I took it out and inspected it. I opened the lid. I can find absolutely no obstruction. The gears are totally jammed. If I'm going to see this working I'm going to drop at least $40 on repairs. I just don't know what to say. This isn't the quality I expect from Hayward. I threw my old Poolvergneugen back in the pool. The Poolvergneugen is working again. A ten year old cleaner is more reliable than this one that's barely 2 months old? ... show more
Reviewed in the United States on May 20, 2021 by Shu-Yan

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