Genuine Maytronics part · Filters

Fine Filter Assembly, M Line

Part number 9991428-ASSY · UPC 718117205255 · 1-year warranty

$15 Maytronics list price

We do not stock this part in our own store yet. Our specialists can confirm the right part number for your robot before you order anywhere.

  • Replacement Fine Filter Assembly
Compatibility

Fits these Dolphin robots.

Confirmed by Maytronics' compatibility checker and each robot's spare-parts list.

Also listed by Maytronics for: Dolphin Sigma, Dolphin M400, Dolphin Nautilus CC Supreme, Dolphin Nautilus CC Plus, Dolphin Nautilus CC Plus w/ Wi-Fi, Explorer, Dolphin Hydro 40, Dolphin DIVER PRO 150, Dolphin Evolution 40, EX45, Dolphin EX45, F40, PS40, SF40, Dolphin SF40, Dolphin Swell M, Dolphin Zenit 15, Dolphin Active Classic, Dolphin Easy Comfort, Dolphin KAPTUR 150, Dolphin X60, Dolphin Maximus X70, Dolphin Zenit 20, Dolphin Active X4, Dolphin Comfort Active, Dolphin KAPTUR 400, PS50, Dolphin Dolphin 4, Dolphin SOPRA PE RFECT, Dolphin TopStar gold, Dolphin Evolution 50, F50, Dolphin Maxi Kart, Dolphin SF50, Dolphin DIVER PRO 400, Dolphin EX60, Dolphin DIVER PRO 500, Dolphin Blue Maxi 65, Dolphin Evolution 60, F60.

Do it yourself

How to replace it at home.

Maytronics' own step-by-step answers and videos for this kind of part.

How to replace the filter panels on my Dolphin robot?Video

Click your robot model to see the video and instructions on how to replace the filter panels on your robot:

S50 (Cayman, T15, T25, Active 10, Escape, Encore, E20, E25) & S100 (Advantage, Proteus DX3, Saturn, Echo, Nautilus CC, Active 15, Escape, Liberty 200/300/400)

S50 (Cayman, T15, T25, Active 10, Escape, Encore, E20, E25)

S100 (Advantage, Proteus DX3, Saturn, Echo, Nautilus CC, Active 15, Escape, Liberty 200/300/400)

Take out the old filter panels

  1. Open the filter cover.
  2. Remove the filter basket from the robot.
  3. Click on the top plastic part on the wide side of the filter, and pull up the panel that pops out. The side (narrow) panels can be removed easily, and the front and back panels need to be released by unscrewing them with a Phillips-head screwdriver.
  4. Repeat on the other side panel of the filter.

Install the new filter panels

  1. Take the new filter panel and slide it into the filter basket.
  2. Press it up against the filter frame until you hear a click.
  3. Repeat the same action for the other side panel of the filter.
  4. When both of the panels are placed inside the filter bag, clip the bottom part of the filter back in place.

S200 (E30, Advantage Ultra, Active 20, Quantum, T30, Proteus DX4, Triton PS) / S300 (E35/E35i, Proteus DX5i, Active 30, T35/T45, Premium 40, Explorer E30, E40i, Active 30i, T55i) / S400 (E50i, Active 50, Explorer E50) / Liberty 600

S200 (E30, Advantage Ultra, Active 20, Quantum, T30, Proteus DX4, Triton PS)

S300 (E35/E35i, Proteus DX5i, Active 30, T35/T45, Premium 40, Explorer E30, E40i, Active 30i, T55i)

S400 (E50i, Active 50, Explorer E50)
Liberty 600

Take out the old filter panels

  1. Open the filter cover.
  2. Remove the filter basket from the robot.
  3. Click on the top plastic part on the side of the filter, and pull up the panel that pops out.
  4. Repeat on the other panels of the filter- narrow and wide.

Install the new filter panels

  1. Take the new filter panel and place it in the bottom rail of the filter.
  2. Push it into the frame until it clips back inside the filter.
  3. Press it up against the filter frame until you hear a click.
  4. Repeat on the other panels of the filter- narrow and wide.

Premier/Dx4 (Bag filter)

To set up the filter bag on your Dolphin Premier:

  1. Flip the robot upside down to access the filter area.
  2. Unlock the clips on the bottom of the filter assembly to remove it.
  3. Pull the filter assembly out
  4. Install the white filter screen with the two screws (if it is not already installed).
  5. Make sure the filter bag is sitting securely on the guard rails of the filter assembly.
  6. Reinstall the filter bag assembly as shown in the guide and video: https://www.youtube.com/watch?v=C7EnD81halc

To set up the filter cartridge assembly on your Dolphin Premier:

  1. Flip the robot upside down to access the filter area.
  2. Unlock the clips on the bottom of the filter assembly to remove it.
  3. Pull the filter assembly out.
  4. (The white filter screen should not be installed.)
  5. Reinstall the filter bag assembly as shown in the guide and video: https://www.youtube.com/watch?v=C7EnD81halc
  6. Lock the clips on the bottom of the filter assembly to lock it into place.

M250 (Dx3, Nautilus CC Plus)

Take out the old filter panels

  1. Open the filter covers and remove filter cartridges from the robot.
  2. Unclasp the clips on the top of the cartridge.
  3. Check the non-return flap for any debris.
  4. Make sure the frame is clean before installing the new panels.

Install the new filter panels

  1. Insert the locating tabs at the bottom of the filter panels into their grooves on the base frame.

M400/M500 (Sigma, Nautilus CC Supreme, Aquarius XL, Oasis)

Take out the old filter panels

  1. Open the filter covers and remove filter cartridges from the robot.
  2. Unclasp the clips on the top of the cartridge.
  3. Check the non-return flap for any debris.
  4. Make sure the frame is clean before installing the new panels.

Install the new filter panels

  1. Insert the locating tabs at the bottom of the filter panels into their grooves on the base frame.

M600/M700 (Active 60, E60i, Premium 60, Explorer E70)

Take out the old filter panels

  1. Open the filter cover.
  2. Remove the filter basket from the robot.
  3. Click on the top plastic part on the side of the filter, and pull up the panel that pops out.
  4. Repeat the same action for the other panels of the filter- narrow and wide.

Install the new filter panels

  1. Take the new filter panel and place it in the bottom rail of the filter.
  2. Push it into the frame until it clips back inside the filter.
  3. Press it up against the filter frame until you hear a click.
  4. Repeat the same action for the other panels of the filter- narrow and wide.

If you are interested in purchasing replacement filter panels, please visit our Spare Parts page. Ensure that you have the correct part number of the filter panels that pair with your robot.

Open this answer on its own page →

How to install the DebrisLock filter and configure the backwash?Video

To upgrade the EON 100 filtration, you can purchase our patented DebrisLock™ (14 micron) filter, which uses backwash technology. It is compatible with EON™ 100, allowing you to benefit from our filtration technology.

DebrisLock™ filter basket

To upgrade to the DebrisLock™ filter, you need to activate the backwash technology via the MaytronicsOne app.

  • Navigate to Settings (three dots in the top-right corner), select Filter Type.
  • Enable the backwash by toggling the Activate Backwash switch. It will turn blue when activated.

To switch to a non-DebrisLock™ filter, you need to deactivate the backwash technology via the MaytronicsOne app.

  • Navigate to Settings (three dots in the top-right corner), select Filter Type.
  • Disable the backwash by toggling the Activate Backwash switch. It should be gray.
  • Click Change to Non-DebrisLock filter, then Confirm.

Open this answer on its own page →

Specifications

Size & Dimension

Gross Weight
0.761 lb

General Info

Warranty (years)
1
UPC
718117205255
Filters

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