Dolphin M400

A spotless clean for your deep pool

3 Years Warranty
Wi-Fi® connectivity
The Dolphin M400 is extremely powerful when it comes to scrubbing and filtering. This Always Connected cleaner allows you to schedule weekly cleanings and spot clean with the new MyDolphin Plus app.
Robot Variations
Perfect cleaning at the push of a button

Main Features


No extra equipment needed. Just plug it in, drop into the pool, for a hassle free clean.

Easy Access Filter

Top-load filter access for super-easy cleaning

MyDolphin™ Plus Mobile app

Smart control of your Dolphin - from anywhere, anytime!

Waterline Scrubbing

Super efficient on vertical surfaces for optimal waterline scrubbing

Weekly Schedular

Customize the pool cleaning schedule and modes to fit your needs

Energy Saver

Dolphins are super-efficient and help reduce water, chemical, and energy usage with every pool cleaning

Tech Specs

  • Weekly Timer Yes
  • Automation Mode Yes
  • Delay Feature No

  • Robot Weight 26.967 lb
  • Package Dimensions 23.661x19.331x19.567 inch
  • Cable Length 60 ft
  • Gross Weight 52.92 lb

  • Filter Type Fine Filter Kit
  • Filter Description Ultra-Fine Filter Kit
  • Filter Access Top Access
  • Cleaning Coverage Floor, Walls and Waterline
  • Full Bag Indicator No
  • Waterline Scrubbing Yes
  • Enhanced Cleaning Cycles No
  • Default Cycle Time 2.5
  • Active Brush Yes
  • Number of Brushes 3
  • Brush Type Standard Brush
  • Anti Tangling Swivel Yes
  • Suction Rate 4500 gph

  • Maximum Pool Size 50 ft
  • Pool Classification In Ground
  • Pool Shape Rectangular, Round, Free Shape, Kidney

  • Warranty 3 Years
  • Remote Control No
  • Caddy or Stand Included Caddy
  • PS Output Max Current A 6
  • PS Input Frequency HZ 50/60
  • PS Input Max Current A 2


User manuals

Dolphin M400


Have more questions about the product?

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Add-On Accessories

Premium Caddy Cover

Classic Caddy Cover

Ultra-Fine Filter Panels (4 pk) Big

Robot Comparison

Maximum Pool Size
50 ft
50 ft
Active Brush
Filter Type
Fine Filter Kit
Cleaning Coverage
Floor, Walls and Waterline
Floor, Walls and Waterline
Caddy or Stand Included
Mobile Application Type
My Dolphin Plus
My Dolphin Plus


53 Reviews
5 42
4 10
3 1
2 0
1 0
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1-2 of 53 Reviews
May 25, 2020

The M Series makes removing it from your pool easy with its fast clean-water release feature and lightweight, ergonomic design.

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Sep 10, 2019
Drop it in and walk away

When our in-ground pool was installed, our pool guy included another brand of automatic pool cleaner. It ran one cycle perfectly. The second time I went to use it, it wouldn't start. WHAT??? Our pool guy replaced it -no questions asked- with a Dolphin M400. Smooth sailing ever since; now in third season. Recommended product.

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