Genuine Maytronics part · Filters
Maytronics Small Ultra-Fine Filters (4 Pack)
Part number 9991422-R4 · UPC 810071221286 · 1 year part warranty
Genuine Maytronics small ultra-fine replacement filter panels for Dolphin W20, supplied in a four-panel pack.
$69.99 MSRP
Not stocked by Poolbots. Sold on Amazon as a genuine Maytronics part.
Ships from Amazon.com. As an Amazon Associate, Poolbots earns from qualifying purchases.
About this part
What it does and when to replace it.
These genuine Maytronics ultra-fine filter panels collect fine debris from water passing through your Dolphin robot. They replace the robot's existing small ultra-fine panels.
Dolphin W20 is the confirmed fit for part 9991422-R4. The pack contains four replacement panels and has a one-year part warranty. Poolbots does not currently stock this part. Contact Poolbots' pool experts by live chat or phone for help identifying it or checking compatibility.
- Have your robot model and part number 9991422-R4 ready when contacting Poolbots' pool experts.
- The spec sheet lists other model names. Ask Poolbots' pool experts to verify fit for any model other than Dolphin W20.
Compatibility
Fits these Dolphin robots.
Confirmed by Maytronics' compatibility checker and each robot's own spare-parts list.
Also listed by Maytronics for: POOL IN, POOL UP, Dolphin POOL UP, Dolphin Swift, Dolphin X FORCE 10, M200, Dolphin M200, Dolphin DX3, Dolphin Swell, Dolphin Swash CL, Cosmos 20, Dolphin X FORCE 20, Dolphin Cosmos 30, Dolphin DX5, Dolphin X FORCE 30.
Do it yourself
How to replace it at home.
Switch off and unplug the power supply.
Remove the robot from the pool and access the filters as shown in its manual.
Note the position and orientation of the old panels, then remove them.
Install the replacement panels in the same positions, following the robot's manual.
Reinstall the filters and secure the filter cover before use.
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
- Package Dimensions
- 17.0x2.4x9.9 inch
- Gross Weight
- 0.849 lb
General Info
- Warranty (years)
- 1
- UPC
- 810071221286
Questions
Maytronics Small Ultra-Fine Filters (4 Pack), answered.
Does part 9991422-R4 fit Dolphin W20?
Yes. Dolphin W20 is confirmed compatible with this filter pack. For other models listed on the Maytronics spec sheet, ask Poolbots' pool experts to verify fit.
How many filter panels are included?
The pack contains four small ultra-fine replacement filter panels.
Can I order this part from Poolbots?
Poolbots does not currently stock this part in its store. Contact Poolbots' pool experts by live chat or phone for help identifying the part and checking fit.
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