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Dolphin T55i versus Dolphin S400
Compare Features, Filters, and Warranty
S400 or T55i. Which wins?
Diving into the S400 vs T55i, 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 T55i or Dolphin S400.
Compare essential features...
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|---|---|---|---|---|
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T55i | S400 | Sigma | Premier |
| Cleans Waterline | Yes | Yes | Yes | Yes |
| NanoFiltration | No |
No |
Yes | Yes |
| MultiMedia | No |
No |
No |
Yes | Dual Stabilizer | No |
No |
Yes | Yes | Gyroscope | No |
No |
Yes | No |
3 Year Warranty | No |
No |
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 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 T55i vs Dolphin S400
| Features | T55i | 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 T55i 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 T55i includes 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 T55i does not include a full filter indicator.
The Dolphin S400 includes a full filter indicator.
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 T55i includes an anti-tangle swivel.
The Dolphin S400 includes an anti-tangle swivel.
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Compare Specifications
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| Part Number | 99996245-WINI | 99996261-US |
|---|---|---|
| ASIN | ||
| Waterline Cleaning | Yes | Yes |
| Multi-Media® | No | No |
| # of Filters Included: | 1 | Ultra-Fine Filter Kit |
| Filter Cleaning | Top Access | Top Access |
| Cleaning Coverage | Floor, Walls and Waterline | Floor, Walls and Waterline |
| Cleaning Cycle | 1.5, 2 hours | 1.5, 2 hours |
| Number of Brushes | 2 | 2 |
| Cable Length | 60 ft | 60 ft |
| Anti-Tangle Swivel | Yes | Yes |
| Pool Types | In Ground | In Ground |
| Maximum Pool Size | 50 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 | Yes |
| Automated Weekly Timer | Yes | Yes |
| Remote operation | No | No |
| Restocking Fee | No |
No |
| Warranty | 2 Years | 2 Years |
| Read Reviews | Dolphin T55i Review | Dolphin S400 Review |
View Other Top Comparisons
Compare all of the top robotic pool cleaners from Maytronics' Dolphin, Aquabot, & More.
Read Our Reviews
Learn more about the Dolphin T55i 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 T55i Review, or browser other top robotic pool cleaner reviews.
Best Sellers for 2024
WHAT'S NEXT?
Try any 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.
