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Dolphin M400 Review

Dive into how the Dolphin M400 performs, its features, what's included, and how it works in our in-depth review. With years of experince in the pool industry, let us help find you the perfect pool robot.

What features does it have?

Wall Climbing

Clean like a pro. With wall coverage, the Dolphin M400 can clean and scale your walls with precision and power. While Wall Climbing is a great feature, don't get this confused with the superior waterline cleaning feature.

What is Dolphin M400 missing?

Waterline Cleaning

Dolphin E70 Waterline Cleaning
Dolphin Explorer E70's Waterline Cleaning

Dolphin M400 does not included waterline cleaning. Not only is this an essential feature that you'll want when looking for a pool robot, but one you will likely need. Waterline cleaning enables the robot to climb and reach the dirtest part of your swimming pool. Without this feature, you'll still need to manually clean your waterline by hand with a brush to prevent any algae or scum that builds up. It is one feature that you'll need that is not included with the Dolphin M400.

Leaf Bag

Dolphin Premier Leaf Bag
Dolphin Premier's EXCLUSIVE Oversized Leaf Bag

With leaves being a common issue, it would be safe to assume most pool robots utilize a leaf bag. Well, no so fast. Nearly every robotic pool cleaner is missing a leaf bag, except the Dolphin Premier. If you have a lot of leaves, this is the best pool robot for leaves. Not to mention the Premier's 3 year warranty, Dual Commercial Motors, and Multi-Media™ make it one of the best models of 2023.

What's included with the Dolphin M400?

The Dolphin M400 includes everything you'll need. Here is what is included with the unit:

  • Dolphin M400 Unit
  • 60 ft Cord with Anti-Tangle Swivel
  • Programmable Weekly Timer
  • Standard Filters
  • 3 Year Warranty

How to set up the Dolphin M400

Simply plug and play. All robotic pool cleaners are ready to go right out of the box. No booster pump or assembly needed. The M400 has everything needed to get started in its box. It's that easy.

Why Poolbots?

No one else knows robotic pool cleaners better than us. Having been in the swimming pool industry for over 25 years and a Dolphin Authorized Dealer, we are proud to offer a full warranty on every robot. We also offer a risk-free 30 day trial on every robot. We understand that finding a robot can be hard, so hopefully this review helps you make an informed decision when finding your next pool cleaner.

Need help? Reach out to us. Our pool experts are standing by ready to help find the perfect pool robot for your swimming pool.

Compare Dolphin M400

Compare the Dolphin M400 to other top robotic pool cleaners like the Dolphin Premier. Want to compare the Dolphin M400 to more robotic pool cleaners? Head over to our compare page.

Dolphin ProLine
Dolphin Logo M400 Premier
Cleans Waterline Yes Yes
Nano
Filtration
No
Yes
MultiMedia
No
Yes
Leaf Bag
No
Yes
Dual Stabilizer Yes Yes
3 Year Warranty Yes Yes
No Restocking Fee
No
Yes
30 Day Trial
No
Yes
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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

Compare Dolphin M400

Want to compare Dolphin M400 to other robotic pool cleaners? Read in-depth comparisons against all the top pool robots out there today. Can't decide? Live chat with our pool experts here

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.

Read Our Reviews

Learn more about the Dolphin M400 on our review. Our in-depth pool robot reviews are written by our pool experts and will help you make an informed decision when purchasing a robotic pool cleaner for your pool. Read the Dolphin M400 Review or browser other top robotic pool cleaner reviews.

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