Dolphin M400 Robotic Pool Cleaner Without Caddy
The Dolphin M400 Robotic Pool Cleaner Without Caddy is extremely powerful when it comes to scrubbing and filtering. This Always Connected cleaner lets you schedule weekly cleanings and trigger spot cleans from anywhere using the MyDolphin Plus app — for pools up to 50 feet.
Built by Maytronics with an anti-tangling swivel cable, fine and ultra-fine filter kits included, a 2.5-hour default cycle, and weekly timer, the M400 delivers thorough floor, wall, and waterline cleaning with app control and a 3-year warranty.
Key Features
MyDolphin Plus App
Schedule weekly cleanings and trigger spot cleans remotely from your smartphone.
Floor, Walls, and Waterline Coverage
Complete pool coverage including walls and waterline scrubbing in every cycle.
Anti-Tangling Swivel Cable
Prevents cable tangles for unrestricted movement throughout the pool.
Fine and Ultra-Fine Filter Kits Included
Both filter types included in the box — switch between them based on debris type.
2.5-Hour Default Cycle
Thorough cleaning cycle sized for pools up to 50 feet.
Weekly Timer
Set a weekly cleaning schedule and let the M400 run automatically.
Always Connected
Wi-Fi enabled for continuous app connectivity and control.
3-Year Warranty
Maytronics' best residential warranty — 3 full years of coverage.
Who It's For
- In-ground pool owners with pools up to 50 feet who want app scheduling and spot cleaning
- Anyone who wants both fine and ultra-fine filtration included out of the box
- Pool owners who want maximum scrubbing power with a 3-year warranty
- Buyers who already have a caddy or don't need one included
Specifications
Cleaning Performance
| Pool Size | Up to 50 ft |
| Cleaning Coverage | Floor, Walls, Waterline |
| Default Cycle Time | 2.5 Hours |
| Weekly Timer | Yes |
| Delay Feature | No |
Filtration
| Filter Type Included | Fine Filter Kit |
| Additional Filter Included | Ultra-Fine Filter Kit |
Cable & Controls
| Anti-Tangling Swivel | Yes |
| Mobile App | MyDolphin Plus |
| Connectivity | Always Connected (Wi-Fi) |
Physical
| Shipping Weight | 40.79 lb |
| Shipping Dimensions | 23.27 × 19.33 × 13.66 in |
| Color | Gray, Blue |
| Caddy Included | No |
Approvals & Warranty
| Application | Residential Pool |
| Warranty | 3 Years |
What's in the Box
- Dolphin M400 Robotic Pool Cleaner
- Power Supply Unit
- Anti-Tangling Swivel Cable
- Fine Filter Kit
- Ultra-Fine Filter Kit
- User Manual
Warranty
The Dolphin M400 comes with a 3-year manufacturer warranty from Maytronics. Clearflow Pool Supply is an authorized Maytronics dealer and will assist with any warranty service needed.
Downloads
Frequently Asked Questions
What does "Without Caddy" mean — can I add one later?
This version of the M400 does not include a caddy for transport and storage. Maytronics caddies are sold separately and are compatible with the M400 if you decide to add one later.
What's the difference between the fine and ultra-fine filter kits?
The fine filter kit handles larger debris like leaves, acorns, and twigs. The ultra-fine filter kit captures smaller particles like sand, algae, and fine dust for the clearest possible water. Both are included with the M400 so you can switch based on your pool's current needs.
What can I do with the MyDolphin Plus app?
The MyDolphin Plus app lets you schedule weekly cleaning cycles, select cycle options, and trigger a spot clean from your smartphone. The M400 is Always Connected via Wi-Fi so you can control it from anywhere.
Does the M400 require a booster pump?
No. The M400 is a self-contained robotic cleaner with its own motor and pump. It plugs directly into a standard outlet and operates completely independently from your pool's filtration system.
Does it clean walls and the waterline?
Yes. The M400 cleans the floor, walls, and waterline in every cycle — delivering complete pool coverage with powerful active scrubbing on all surfaces.