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The Dolphin S400 brings in-store exclusive functionality to inground pools up to 50 feet, featuring waterline cleaning, an anti-tangle swivel, and the MyDolphin Plus mobile app for remote control. Its lightweight design and multi-layer filter provide easy maintenance, but it may fall short for users looking for more filter customization options. Though it’s designed for thorough coverage, some may find more affordable alternatives that deliver similar performance, especially given the S400's premium price.
Sigma adds waterline cleaning, NanoFilters™, triple motors, gyroscope, 3 year warranty + 30 Day Free Trial.
Premier adds waterline cleaning, commercial grade motors, MultiMedia™, NanoFilters™, 3 year warranty + 30 Day Free Trial.
Try any robot in your pool risk-free for 30 days. We believe a pool robot is an investment, and we know you'll love it. Which is why we have a 30 Day Free Trial. 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.
Here at Poolbots, we carry only the top models for the top brands. All of our pool robots are backed by a full manufacturer's warranty - not prorated or limited to cycles like other pool robots.
Easily transport your Dolphin S400 with the Dolphin Universal Caddy. Fits any Dolphin Robotic Pool Cleaner.
| Waterline Cleaning | No |
|---|---|
| Wall Climbing | Yes |
| Dual Stabilizer | No |
| Number of Motors | 2 |
| Gallons Filtered Per Hour | 4000 GPH |
| Filter Types | Top Access |
| Pool Coverage | Floor, Walls and Waterline |
| Pool Types | In Ground |
| Pool Size | 50 ft |
| Pool Shapes | Rectangle, Oval, or Freeform |
| Pool Surfaces | Gunite, Fiberglass, Vinyl, Liner |
| Cable Length | 60 ft |
| Anti-Tangle Swivel | Yes |
| Obstacle Avoidance | Steps, Ladder, Drain Cover, Ledges, Pop-Ups |
| Warranty | 2 Years |
| Brand | Dolphin |
| Manufacturer | Maytronics |
| Part Number | 99996261-US |
No, we never charge a restocking fee ever! We know a robotic pool cleaner is a big investment, which is why we offer Free 30-Day Trials on all robotic pool cleaners!
As a proud Authorized Dealer for Dolphin, the Dolphin S400 includes a full 2 year warranty from date of purchase.
No! The Dolphin S400 is plug and play! All you need to do is unbox the unit and plug it into an outlet. No setup or assembly required!
With a main drain clip on, you can successfully avoid the robot getting stuck on your drain.
Yes. The Dolphin S400 works with all types of pools, including freshwater and saltwater.
The Dolphin S400 is compatible with the following types of pools: In-ground pools, above-ground pools, gunite pools, tile pools, fiberglass pools, and viny pools of all shapes and sizes. If you have any questions or wonder if this is the right robot for you, contact us or view our Pool Robot Guide.
Yes, the Dolphin S400 has wifi and bluetooth that allows you to connect and control the robot from the app.
Yes, the Dolphin S400 has an app to control the robot.
The Dolphin S400 cleans for 1.5, 2 hours. You can set the robot to run daily via its included programmable timer.
The Dolphin S400 weighs 18.5 lb.
The Dolphin S400 works as an automatic robotic pool cleaner. It will vacuum, scrub, and automate your pool cleaning. With a plug and play design, all you need is an outlet to plug it into and you’re good to go. No booster pump or assembly needed.
The Dolphin S400 can pick up leaves. While not as effective as the Dolphin Premier, which includes an oversized leaf bag.
The Dolphin S400 cannot perform as well as robots with NanoFiltration. As the mesh filters on Dolphin S400 cannot capture small particles like the newer Gen-2 NanoFilters. See all robots with NanoFiltration here.
The Dolphin S400 does not have NanoFilters. See all robots with NanoFilters here.
Yes, the Dolphin S400 cleans the waterline.
Yes, the Dolphin S400 cleans your entire pool - including the floor, walls, and waterline.
Yes it can!
If your Dolphin powers on but does not move, try checking the tracks for any debris or obstructions. Also, check the drive motor and impeller for any damage or wear. If you are still having issues, contact Maytronics customer support for further assistance.
If your Dolphin's power supply is not turning on, check to make sure it is properly plugged in and that the outlet it is plugged into is working. If the power supply is still not turning on, contact Maytronics customer support for further assistance.
If your Dolphin S400 is not cleaning the pool properly, try checking the filter bag for any debris or blockages. Also, check the brushes and tracks for any damage or wear. If you are still having issues, contact Maytronics customer support for further assistance.
The handles on your Dolphin are for lifting and carrying the unit, while the floats are designed to help your Dolphin navigate around the pool and maintain proper buoyancy.
To remove any debris or obstructions from your Dolphin's tracks, turn off the power supply and carefully remove the tracks from the unit. Use a soft brush or cloth to clean the tracks and remove any debris. Once clean, reattach the tracks to the unit.
If the power unit LED indication is off even when the charger is connected, please try the following steps: 1) Unplug the power supply from the outlet and wait for 10 seconds. 2) Plug the power supply back in and check if the LED indication turns on. 3) If the LED indication still does not turn on, contact Maytronics customer support for further assistance.
Registering your Dolphin robotic pool cleaner allows you to receive important product updates and notifications, as well as access to exclusive content and promotions.
Learn more about Nanofilters™, MaxBin™, and so much more to find which pool robot is right for you. Use our Pool Robot Selector to enter your pool type and find an exact match for your swimming pool's needs or read the Best Dolphin Pool Cleaner for 2025.
