Head-to-Head Comparison
Dolphin Liberty 400 vs Dolphin Active 40
Our pool experts compare features, filtration, specs, and value to help you pick the right robotic pool cleaner.
Dolphin Active 40 or Dolphin Liberty 400 — which wins?
Our Recommendations
Neither the Dolphin Liberty 400 nor the Dolphin Active 40 is a cleaner we carry. Here are the robots our pool experts recommend instead — proven Dolphin ProLine and Max-Series models, each backed by the full manufacturer warranty and our 30-day in-pool trial.
Dolphin Cayman
- Free NanoFilter Panels with Purchase
- Active Brush - Scrubs 2X Faster
- 2 Year Warranty
- Built for Above Ground and Inground Pools Up to 33ft
Dolphin Quantum
- myDolphin Plus App with Weekly Timer
- XXL MaxBin™ with NanoFilters
- 2 Year Warranty
- Built for Inground & Above Ground Pools up to 50ft
Dolphin Escape
- Free NanoFilter Panels with Purchase
- Active Brush - Scrubs 2X Faster
- 2 Year Warranty
- Built for Above Ground and Inground Pools Up to 33ft
Side by Side
Feature Comparison
The features that matter most when comparing the Dolphin Liberty 400 and Dolphin Active 40.
| Feature | Liberty 400 | Active 40 |
|---|---|---|
| Standard Filter | ||
| Wall Climbing | ||
| Waterline Cleaning | ||
| Programmable Weekly Timer | ||
| Full Filter Indicator | ||
| Anti-Tangle Swivel |
Explained
Compare Features in Detail
Programmable Weekly Timer
An automatic pool cleaner should be automatic. A programmable weekly timer sets the robot to clean on a schedule — every day, every other day, or a few times a week — without you turning it on and off.
Full Filter Indicator
Know exactly when it's time to clean. The power supply alerts you directly when the filter is full — no need to pull out the unit to check.
Anti-Tangle Cable Swivel
Say goodbye to tangled cords. An anti-tangle swivel lets the robot move 360° around your pool without the cord getting tangled, so you can sit back while it cleans. Learn more ›
Warranty Coverage
A robot is only as good as its warranty. Buying through an Authorized Dealer like Poolbots gets you the full manufacturer warranty — never pro-rated or limited by cleaning cycles — plus a 30-day in-pool trial with no restocking fees. Learn more ›
The Details
Specifications
| Liberty 400 | Active 40 | |
|---|---|---|
| Part Number | — | 99996271-US |
| Waterline Cleaning | No | Yes |
| Multi-Media® | No | No |
| Filters Included | — | 1 |
| Filter Cleaning | Filter Basket | Top Access |
| Cleaning Coverage | Floor and Walls | Floor, Walls and Waterline |
| Cleaning Cycle | 1.5 hours | 1.5, 2 hours |
| Number of Brushes | 1 | 2 |
| Cable Length | No Cable | 60 ft |
| Anti-Tangle Swivel | — | Yes |
| Pool Types | In-Ground & Above 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 | Concrete, Plaster, Gunite, Pebble, Tile, Vinyl Liner, Fiberglass | Gunite, Fiberglass, Vinyl, Liner |
| Media-Alert® | — | Yes |
| Automated Weekly Timer | — | Yes |
| Remote Operation | No | No |
| Restocking Fee | — | No |
| Warranty | 2 Years | 2 Years |
Go Deeper
Read Our Expert Reviews
Our in-depth reviews are written by pool experts to help you make an informed decision.
Dolphin Liberty 400
Read Dolphin Liberty 400 ReviewDolphin Active 40
Read Dolphin Active 40 ReviewKeep Comparing
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What’s Next?
Still narrowing it down? These expert guides and tools make it easy to find the right pool robot for your pool — most ship free, same day.
Pool Robot Buying Guide
Everything to know before you buy your first robot.
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Robot Selector
Answer a few quick questions and get a recommendation.
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Videos
Watch reviews, comparisons, and expert how-tos.
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Pool Volume Calculator
Calculate your exact pool volume to find the right robot.
Read more →Try It in Your Own Pool for 30 Days
Every pool deserves an intelligent robot. If you don't love it, simply return it — we never charge a restocking fee. Free shipping on every order.
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