Genuine Maytronics part · Filters
Maytronics Ultra-Fine Filter Assembly, M Line
Part number 9991427-ASSY · UPC 810071221705 · 1 year part warranty
Replacement ultra-fine filter assembly for Dolphin M400, Dolphin Wave 80 and Dolphin Nautilus CC Plus WiFi.
$15 MSRP
Out of stock
About this part
What it does and when to replace it.
This genuine Maytronics replacement assembly captures fine debris from water passing through your Dolphin robot. It replaces the existing ultra-fine filter assembly.
Part 9991427-ASSY is confirmed for Dolphin M400, Dolphin Wave 80 and Dolphin Nautilus CC Plus WiFi. Poolbots does not currently stock it in its own store. Contact Poolbots' pool experts by live chat or phone for help identifying the part and checking fit.
- Rinse the filter assembly after use to keep debris from building up.
- Have part number 9991427-ASSY and your robot's exact model name ready when contacting Poolbots' pool experts.
Compatibility
Fits these Dolphin robots.
Confirmed by Maytronics' compatibility checker and each robot's own spare-parts list.
Also listed by Maytronics for: 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, M400, Dolphin M400, Dolphin EX60, Dolphin DIVER PRO 500, Dolphin Blue Maxi 65, Dolphin Evolution 60, F60, Dolphin F60, PS60, SF60.
Do it yourself
How to replace it at home.
Switch off and unplug the power supply.
Remove the robot from the pool and let it drain.
Open the filter access and remove the existing ultra-fine filter assembly.
Place the replacement assembly in the same position and check that it sits securely.
Close the filter access before reconnecting the power supply.
Step-by-step answers for this kind of part
How do I replace the filter panels on my Dolphin robot?Video15 min
Find your model below, then follow its video and instructions. The panel removal and installation steps vary by filter design.
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)
Step 1Remove the old filter panels
- Lift the filter cover open.
- Take the filter basket out of the robot.
- Press the plastic release at the top of the filter's wide side, then lift out the released panel. The narrow side panels come out easily. The front and back panels are secured with screws, so use a Phillips-head screwdriver to release them.
- Follow the same process for the opposite side panel.
Step 2Install the replacement panels
- Slide a replacement panel into the basket.
- Push the panel against the frame until it clicks into place.
- Fit the other side panel the same way.
- With both panels in position, clip the filter's bottom section back into 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
Step 1Remove the old filter panels
- Lift the filter cover open.
- Take the filter basket out of the robot.
- Press the plastic release at the top of the filter's side, then lift out the panel that releases.
- Work through the remaining narrow and wide panels using the same method.
Step 2Install the replacement panels
- Set the bottom edge of a replacement panel into the filter's lower rail.
- Push the panel into the frame so it clips into the filter.
- Press it against the frame until you hear it click.
- Fit each remaining narrow and wide panel the same way.
Premier/Dx4 (Bag filter)
Filter bag setup for Dolphin Premier
- Turn the robot upside down so you can reach the filter area.
- Release the clips underneath the filter assembly.
- Lift the assembly out of the robot.
- If the white filter screen is not already fitted, secure it with the two screws.
- Check that the filter bag sits securely on the assembly's guard rails.
- Put the filter bag assembly back in, following the guide and video.
Filter cartridge assembly setup for Dolphin Premier
- Turn the robot upside down so you can reach the filter area.
- Release the clips underneath the filter assembly.
- Lift the assembly out of the robot.
- Make sure the white filter screen is not installed for this setup.
- Follow the guide and video to reinstall the assembly.
- Fasten the clips underneath the assembly to secure it.
M250 (Dx3, Nautilus CC Plus)
Step 1Prepare the filter cartridges
- Lift the filter covers and take the cartridges out of the robot.
- Release the clips at the top of each cartridge.
- Inspect the non-return flap for debris.
- Check that the frame is clean before fitting replacement panels.
Step 2Fit the replacement panels
- Seat the locating tabs along the bottom of each panel in the matching grooves on the base frame.
M400/M500 (Sigma, Nautilus CC Supreme, Aquarius XL, Oasis)
Step 1Prepare the filter cartridges
- Lift the filter covers and take the cartridges out of the robot.
- Release the clips at the top of each cartridge.
- Inspect the non-return flap for debris.
- Check that the frame is clean before fitting replacement panels.
Step 2Fit the replacement panels
- Seat the locating tabs along the bottom of each panel in the matching grooves on the base frame.
M600/M700 (Active 60, E60i, Premium 60, Explorer E70)
Step 1Remove the old filter panels
- Lift the filter cover open.
- Take the filter basket out of the robot.
- Press the plastic release at the top of the filter's side, then lift out the panel that releases.
- Work through the remaining narrow and wide panels using the same method.
Step 2Install the replacement panels
- Set the bottom edge of a replacement panel into the filter's lower rail.
- Push the panel into the frame so it clips into the filter.
- Press it against the frame until you hear it click.
- Fit each remaining narrow and wide panel the same way.
Replacement panels and filter care
You can purchase replacement filter panels from Poolbots. Before ordering, confirm that the panel part number matches your robot. For help choosing the correct panels, contact Poolbots' pool experts by live chat or phone.
Additional references:
Specifications
Size & Dimension
- Gross Weight
- 0.992 lb
General Info
- Warranty (years)
- 1
- UPC
- 810071221705
Questions
Maytronics Ultra-Fine Filter Assembly, M Line, answered.
Which robots fit this filter assembly?
Confirmed compatible models are Dolphin M400, Dolphin Wave 80 and Dolphin Nautilus CC Plus WiFi.
Does Poolbots stock this part?
Poolbots does not currently stock 9991427-ASSY in its own store. Contact Poolbots' pool experts by live chat or phone for help identifying the part and checking fit.
What warranty comes with this part?
The listed part warranty is 1 year.
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