Dolphin W20 versus Dolphin S400
Compare Features, Filters, and Warranty
S400 or W20. Which wins?
Diving into the S400 vs W20, our pool experts distinguish the key features you'll want to look for when choosing a pool robot. That way, you can decide between the Dolphin W20 or Dolphin S400.
Compare essential features...
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W20 | S400 | Sigma | Premier |
| Cleans Waterline | No |
Yes | Yes | Yes |
| NanoFiltration | No |
No |
Yes | Yes |
| MultiMedia | No |
No |
No |
Yes | Dual Stabilizer | Yes | No |
Yes | Yes | Gyroscope | No |
No |
Yes | No |
3 Year Warranty | Yes | No |
Yes | Yes |
| No Restocking Fee | Yes | No |
Yes | Yes |
| 30 Day Trial | Yes | No |
Yes | Yes |
| Shop Now | Buy | Buy | Buy | Buy |
Shoppers ultimately bought... Compare vs.
Dolphin Sigma
Sigma adds waterline cleaning, NanoFilters™, triple motors, gyroscope, 3 year warranty + 30 Day Free Trial.
Dolphin Premier
Premier adds waterline cleaning, commercial grade motors, MultiMedia™, NanoFilters™, 3 year warranty + 30 Day Free Trial.
Compare Dolphin W20 vs Dolphin S400
| Features | W20 | S400 |
|---|---|---|
| Standard Filter |  |
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| NanoFilters™ |  |
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| MaxBin™ | |
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| Multi-Media™ | |
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| Leaf Bag | |
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| Wall Climbing | |
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| Waterline Cleaning | |
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| Programmable Timer | |
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| Full Filter Indicator | |
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| Gyroscope | |
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| Dual Stabilizer | |
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| Anti-Tangle Swivel | |
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| 3 Year Warranty | |
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Compare Features
Standard Fine Filter
These standard filters help capture larger items such as small leaves and other debris, while maximizing flow rate. However, if your pool struggles with cloudy pool water, small algae, or sand. You many want to consider a unit with NanoFilters™.
The Dolphin W20 includes a standard filter.
The Dolphin S400 includes a standard filter.
Programmable Weekly Timer
An automatic pool cleaner should be automatic, right? With a programmable weekly timer, you can set the robot to clean at different intervals. So your pool robot can clean for you everyday of the week while you sit back and relax - without the need to manually turn it on and off everyday.
The Dolphin W20 does not include a weekly timer.
The Dolphin S400 includes a weekly timer.
Full Filter Indicator
Let's you know when it is time to clean. With a full filter indicator, you won't have to guess when it is time to clean. The power supply will alert you directly, without having to pull out the unit to check.
The Dolphin W20 does not include a full filter indicator.
The Dolphin S400 includes a full filter indicator.
Dual Stabilizer
This essential piece to waterline cleaning allows the unit to cling to the walls of your pool - allowing a more precise and deeper clean at the waterline. Units with dual stabilizers have increased performance and agility while cleaning. It also doubles as an easy handle to pickup your robot from.
The Dolphin W20 includes a dual stabilizer.
The Dolphin S400 does not include a dual stabilizer.
Anti-Tangle Cable Swivel
Say goodbye to pesky tangled cords. An anti-tangle swivel allows the robot to move 360 degrees around your pool without the cord getting tangled. So you can sit back and enjoy while your pool robot vacuums and cleans for you.
The Dolphin W20 includes an anti-tangle swivel.
The Dolphin S400 includes an anti-tangle swivel.
3 Year Warranty
A robot is only as important as its warranty. By purchasing through an Authorized Maytronics Dealer such as Poolbots, you'll get the full warranty on all robotic pool cleaners available on Poolbots.com. Try any robotic pool cleaner risk-free for 30 days in your pool without any restocking fees.
The Dolphin W20 includes a 3 year warranty.
The Dolphin S400 includes a 2 year warranty.
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Compare Specifications
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| Part Number | 99996904-US | 99996261-US |
|---|---|---|
| ASIN | B09S4NFGXB | |
| Waterline Cleaning | No | Yes |
| Multi-Media® | No | No |
| # of Filters Included: | 1 | Ultra-Fine Filter Kit |
| Filter Cleaning | Bottom Access | Top Access |
| Cleaning Coverage | Floor | Floor, Walls and Waterline |
| Cleaning Cycle | 3 hours | 1.5, 2 hours |
| Number of Brushes | 2 | 2 |
| Cable Length | 80 ft | 60 ft |
| Anti-Tangle Swivel | Yes | Yes |
| Pool Types | In Ground | In Ground |
| Maximum Pool Size | 68 ft | 50 ft |
| Pool Shape | Rectangular, Free Shape, Hopper, Kidney, Zero (beach) entry | Rectangle, Oval, or Freeform |
| Obstacles | Steps, Ladder, Drain Cover, Ledges, Pop-Ups | Steps, Ladder, Drain Cover, Ledges, Pop-Ups |
| Surface | Gunite, Fiberglass, Vinyl, Liner | Gunite, Fiberglass, Vinyl, Liner |
| Media-Alert® | No | Yes |
| Automated Weekly Timer | No | Yes |
| Remote operation | Yes | No |
| Restocking Fee | No |
No |
| Warranty | 3 Years | 2 Years |
| Read Reviews | Dolphin W20 Review | Dolphin S400 Review |
View Other Top Comparisons
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Read Our Reviews
Learn more about the Dolphin W20 and Dolphin S400 in our reviews. Our in-depth pool robot reviews are written by our pool experts and will help you make an informed decision when purchasing a robotic pool cleaner for your pool. Read the Dolphin S400 Review, Dolphin W20 Review, or browser other top robotic pool cleaner reviews.
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WHAT'S NEXT?
Try in your own pool for 30 days.
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