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Choose from top models from the top brands.

Free 1-2 Day Shipping. Low Price Guarantee. Easy Returns/Exchanges.

Choose from top models from the top brands.

Free 1-2 Day Shipping. Low Price Guarantee. Easy Returns/Exchanges.

Choose from top models from the top brands.

  • Dolphin M400
    Authorized Maytronics Dealer
  • Dolphin M400 Poolside
  • Dolphin M400 Poolside 2
  • Dolphin M400 Poolside Cleaning Robot 3
  • Dolphin M400 Underwater Wall Cleaning 4
  • Dolphin M400 Poolside Waterline Cleaning 5
  • Dolphin M400 Underwater 6
  • Dolphin M400 Robotic Pool Cleaner

Dolphin M400

  • Easy Access Filter - Top-load filter access for easy and convenient debris removal and cleaning
  • MyDolphin Plus Mobile app - Smart control of your Dolphin - Anytime, Anywhere
  • Waterline Scrubbing - Super efficient on vertical surfaces for optimal waterline scrubbing
  • Weekly scheduler - Customize your weekly schedule cleaning times to fit your needs
  • Energy Saver - Reduces water, chemical, and energy usage with every pool cleaning

Condition: New

Shoppers Ultimately Bought...compare vs.

Dolphin Sigma

Sigma adds waterline cleaning, triple motors, gyroscope, 3 year warranty + 30 Day Free Trial.

Dolphin Premier

Premier adds waterline cleaning, dual commercial grade motors, MultiMedia™, 3 year warranty + 30 Day Free Trial.

M400 Product Video

Try Risk-Free for 30 Days

Buy with Confidence

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.

M400 Accessories

Dolphin Universal Caddy

Easily transport your Dolphin M400 with the Dolphin Universal Caddy. Fits any Dolphin Robotic Pool Cleaner.

Dolphin M400 Specifications

Waterline Cleaning No
Wall Climbing Yes
Dual Stabilizer Yes
Number of Motors 2
Gallons Filtered Per Hour 4500 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 3 Years
Brand Dolphin
Manufacturer Maytronics
Part Number 99991046-USI

Questions and Answers

Do you charge any restocking fees in your 30 Day Free Trial?

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!

How long is the Dolphin M400's warranty?

As a proud Authorized Dealer for Dolphin, the Dolphin M400 includes a full 3 year warranty from date of purchase.

Does Dolphin M400 need a booster pump to work?

No! The Dolphin M400 is plug and play! All you need to do is unbox the unit and plug it into an outlet. No setup or assembly required!

My Dolphin M400 gets stuck on drains, how can I fix this?

With a main drain clip on, you can successfully avoid the robot getting stuck on your drain.

Compare Dolphin M400

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