Help me choose
Residential and commercial pools need different robots
Dolphin Sigma and Dolphin W20 serve different kinds of pools, so there is no honest one-size-fits-all winner. Choose Dolphin Sigma for residential use. Choose Dolphin Wave 60 for commercial use.
ProLine
Dolphin Sigma
Inground pools up to 50 ft that need floor, wall and waterline cleaning, with fine debris.
Choose residential and commercial cleaners separately
Dolphin Sigma
Inground pools up to 50 ft that need floor, wall and waterline cleaning, with fine debris.
$2,399
Buy Dolphin Sigma
Dolphin Wave 60
Commercial pools up to 50 ft that need floor, wall and waterline cleaning.
$1,699
Buy Dolphin Wave 60Dolphin Sigma or Dolphin W20: our take
Dolphin Sigma 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 Sigma is intended for inground pools, while Dolphin W20 is intended for commercial pools. Dolphin Sigma 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 Sigma lists 2 active brushes, SmartNav 3.0 with gyroscope navigation, and Triple commercial-grade DC motors. Dolphin W20 lists Commercial-grade motors.
Filtration and debris
Dolphin Sigma has documented included filtration—Standard filter and NanoFilters—while the other model's included media is not fully published. That gives Dolphin Sigma the clearer documented edge for fine silt, pollen and sand.
Controls and day-to-day ownership
Dolphin Sigma provides a weekly timer, smartphone control, and included remote control; Dolphin W20 provides no fully published timer, app or remote specification. Dolphin Sigma uses a 55 ft corded cable with an anti-tangle swivel, while Dolphin W20 uses continuous corded power.
Price, warranty and the decision
Dolphin Sigma is listed at $2,399 and Dolphin W20 at $1,999; Dolphin W20 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 Sigma. 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 Sigma | 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 | Yes | 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 Sigma stands out
Dolphin Sigma is the better fit for inground pools up to 50 ft that need floor, wall and waterline cleaning, with fine debris.
- Includes filtration for sand, pollen and other fine debris
- Uses a triple-motor cleaning system
- Has documented smartphone control
Where Dolphin W20 stands out
Dolphin W20 is the better fit for shoppers prioritizing the lower $1,999 starting price.
- Is listed $400 lower
- Corded, plug-in power supply
Dolphin Sigma 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 Sigma | 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 | $2,399 | $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, NanoFilters | Not listed |
| Scheduling | Weekly schedule + app | Not listed |
| App and remote | App + included remote | Not listed |
| Cable | 55 ft with anti-tangle swivel | Not listed |
| Robot weight | 24.6 lb | Not listed |
| Warranty | 3 years | 3 years |
Choose for the pool you operate
Dolphin Sigma and Dolphin W20 serve different kinds of pools, so there is no honest one-size-fits-all winner. Choose Dolphin Sigma for residential use. Choose Dolphin Wave 60 for commercial use.
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