Dolphin S100 versus Dolphin M400
Compare Features, Filters, and Warranty
M400 or S100. Which wins?
Diving into the M400 vs S100, 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 S100 or Dolphin M400.
Compare essential features...
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S100 | M400 | Sigma | Premier |
| Cleans Waterline | No |
Yes | Yes | Yes |
| NanoFiltration | No |
No |
Yes | Yes |
| MultiMedia | No |
No |
No |
Yes | Dual Stabilizer | No |
Yes | Yes | Yes | Gyroscope | No |
No |
Yes | No |
3 Year Warranty | No |
Yes | Yes | Yes |
| No Restocking Fee | No |
No |
Yes | Yes |
| 30 Day Trial | No |
No |
Yes | Yes |
| Shop Now | Buy | Buy | Buy | Buy |
Shoppers ultimately bought... Compare vs.
Dolphin Cayman
Upgraded Max-Series™ with Wall Climbing, MaxBin™, Weekly Smart Timer, and NanoFiltration™ Capability
Dolphin Premier
Premier adds waterline cleaning, commercial grade motors, MultiMedia™, NanoFilters™, 3 year warranty + 30 Day Free Trial.
Compare Dolphin S100 vs Dolphin M400
| Features | S100 | M400 |
|---|---|---|
| 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 S100 includes a standard filter.
The Dolphin M400 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 S100 includes a weekly timer.
The Dolphin M400 includes a weekly timer.
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 S100 does not include a dual stabilizer.
The Dolphin M400 includes 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 S100 does not include an anti-tangle swivel.
The Dolphin M400 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 S100 includes a 2 year warranty.
The Dolphin M400 includes a 3 year warranty.
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Compare Specifications
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| Part Number | 99996121-USF | 99991046-USI |
|---|---|---|
| ASIN | ||
| Waterline Cleaning | No | Yes |
| Multi-Media® | No | No |
| # of Filters Included: | Ultra-Fine Filter Kit | Ultra-Fine Filter Kit |
| Filter Cleaning | Top Access | Top Access |
| Cleaning Coverage | Floor and Walls | Floor, Walls and Waterline |
| Cleaning Cycle | 2 hours | 2.5 hours |
| Number of Brushes | 1 | 3 |
| Cable Length | 50 ft | 60 ft |
| Anti-Tangle Swivel | No | Yes |
| Pool Types | In Ground | In Ground |
| Maximum Pool Size | 33 ft | 50 ft |
| Pool Shape | Rectangle, Oval, or Freeform | 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 | No |
| Automated Weekly Timer | Yes | Yes |
| Remote operation | No | No |
| Restocking Fee | No |
No |
| Warranty | 2 Years | 3 Years |
| Read Reviews | Dolphin S100 Review | Dolphin M400 Review |
View Other Top Comparisons
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Read Our Reviews
Learn more about the Dolphin S100 and Dolphin M400 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 M400 Review, Dolphin S100 Review, or browser other top robotic pool cleaner reviews.
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WHAT'S NEXT?
Try in your own pool for 30 days.
Every pool deserves an intelligent robot. If you don't love it, simply return the robot. Unlike the other guys, we never charge a restocking fee or any other fees - meaning no restocking fee ever.
