Help me choose
Residential and commercial pools need different robots
Dolphin M400 and Dolphin W20 serve different kinds of pools, so there is no honest one-size-fits-all winner. Choose Dolphin Quantum for residential use. Choose Dolphin Wave 60 for commercial use.
M-Line
Dolphin M400
Inground pools up to 50 ft that need floor, wall and waterline cleaning, with fine debris.
Choose residential and commercial cleaners separately
Dolphin Quantum
Inground pools up to 50 ft that need floor, wall and waterline cleaning, with fine debris.
$1,649
Buy Dolphin Quantum
Dolphin Wave 60
Commercial pools up to 50 ft that need floor, wall and waterline cleaning.
$1,699
Buy Dolphin Wave 60Dolphin M400 or Dolphin W20: our take
Dolphin M400 and Dolphin W20 can be compared on specifications, but they are designed for different jobs. Start with residential versus commercial use, then use the details below to understand the tradeoffs.
Pool fit and cleaning reach
Dolphin M400 is intended for inground pools, while Dolphin W20 is intended for commercial pools. Dolphin M400 has a published maximum pool length of 50 ft; the other model does not have a verified length in our source material. Each cleans floor, walls, and waterline, so coverage alone does not separate them. Dolphin W20's documented cleaning system includes Commercial-grade motors.
Filtration and debris
Dolphin M400 has documented included filtration—Standard filter and UltraFilter—while the other model's included media is not fully published. That gives Dolphin M400 the clearer documented edge for fine silt, pollen and sand.
Controls and day-to-day ownership
Dolphin M400 provides smartphone control; Dolphin W20 provides no fully published timer, app or remote specification. Dolphin M400 uses a 60 ft corded cable with an anti-tangle swivel, while Dolphin W20 uses continuous corded power.
Price, warranty and the decision
Dolphin M400 is listed at $1,599 and Dolphin W20 at $1,999; Dolphin M400 is $400 less. Each lists a 3-year manufacturer warranty. These robots are built for different jobs, so pool type and facility capacity decide the comparison before individual features do. For a residential pool, the Pool Express pick is Dolphin Quantum. Inground pools up to 50 ft that need floor, wall and waterline cleaning, with fine debris. For a commercial facility, the Pool Express pick is Dolphin Wave 60. Commercial pools up to 50 ft that need floor, wall and waterline cleaning.
Feature check: what each robot actually has
A green check means the feature is documented as included. A red X means it is documented as absent. A dash means the source does not make the feature clear.
| Feature | Dolphin M400 | Dolphin W20 |
|---|---|---|
| Cleans the pool floor | Yes | Yes |
| Climbs and cleans walls | Yes | Yes |
| Scrubs the waterline | Yes | Yes |
| Fine-debris filter included | YesEdge | No |
| Large-debris filter | No | No |
| Automatic scheduling | Not listed | Not listed |
| Smartphone app | Yes | Not listed |
| Anti-tangle swivel | Yes | Not listed |
| 3-year warranty | Yes | Yes |
| No recharging between cycles | Yes | Yes |
| Built-in UV-C water treatment | No | No |
Unknown is not treated as “no.” Specifications come from the product pages, current catalog records and manufacturer material collected for this site.
Where Dolphin M400 stands out
Dolphin M400 is the better fit for shoppers prioritizing the lower $1,599 starting price.
- Includes filtration for sand, pollen and other fine debris
- Has documented smartphone control
- Is listed $400 lower
Where Dolphin W20 stands out
Dolphin W20 is the better fit for commercial pools that need floor, wall and waterline cleaning.
- Corded, plug-in power supply
- Commercial-grade motors
Dolphin M400 vs Dolphin W20 specifications
Use pool fit first. Price and app control do not make up for a robot that cannot cover the length or surfaces you need cleaned.
| Specification | Dolphin M400 | Dolphin W20 |
|---|---|---|
| Best fit | Inground pools up to 50 ft that need floor, wall and waterline cleaning, with fine debris. | Commercial pools that need floor, wall and waterline cleaning. |
| Starting price | $1,599 | $1,999 |
| Pool type | Inground | Commercial |
| Maximum pool length | Up to 50 ft | Not listed |
| Cleaning coverage | Floor, Walls, Waterline | Floor, Walls, Waterline |
| Power | Corded | Corded |
| Filtration | Standard filter, UltraFilter | Not listed |
| Scheduling | Not listed | Not listed |
| App and remote | App control | Not listed |
| Cable | 60 ft with anti-tangle swivel | Not listed |
| Robot weight | Not listed | Not listed |
| Warranty | 3 years | 3 years |
Choose for the pool you operate
Dolphin M400 and Dolphin W20 serve different kinds of pools, so there is no honest one-size-fits-all winner. Choose Dolphin Quantum for residential use. Choose Dolphin Wave 60 for commercial use.
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