Search  for anything...
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
Checking for the best price...
$599.00 Why this price?
Save $699.00 was $1,298.00

Buy Now, Pay Later

As low as / mo
  • – Up to 36-month term if approved
  • – No impact on credit to apply
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout.

Payment plans are offered through our trusted finance partners Klarna, Affirm, Afterpay, Apple Pay, and PayTomorrow. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Selected Option

Free shipping on this product

This item is eligible for return within 30 days of receipt

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

Availability: In Stock.
Fulfilled by BackyardPoolSuperstore
Arrives Thursday, May 14
Order within 16 hours and 44 minutes
Available payment plans shown during checkout
Protection Plan Protect Your Purchase
Checking for protection plans...

Recently Viewed

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


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


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


Item Weight: 19.9 Pounds


Hose Length: 40 Inches


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.


Brand Name: Hayward


Model Name: W3PHS41CST


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


Color: Blue


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Thursday, May 14

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.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Similar Products

Top Amazon Reviews

    • 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
    • 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
    • The best for inground pool
Style: 4-Wheel
Works perfectly out of the box with most parts readily replaceable
Reviewed in the United States on March 1, 2026 by Sentryone
    • 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
    • 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
    • Pool Cleaner
Style: 2-Wheel
Second unit in 10 years and love it....does a great job for cleaning the sides and bottom of my 10,000 gal. pool ... very maintenance free!
Reviewed in the United States on March 8, 2026 by rbarta61

Can't find a product?

Find it on Amazon first, then paste the link below.
Checking for best price...