Genuine Maytronics part · Filters
Cartridge Filter S400 Assembly
Part number 9991481-R1 · 1 year part warranty
Genuine Maytronics ultra-fine replacement filter basket for Dolphin S200, Dolphin Quantum and Dolphin Active 20.
$214 MSRP
Out of stock
About this part
What it does and when to replace it.
The Cartridge Filter S400 Assembly is a genuine Maytronics replacement ultra-fine filter basket. Part 9991481-R1 replaces the basket in compatible Dolphin robots to collect fine debris during cleaning.
Confirmed compatible models include Dolphin S200, Dolphin Quantum and Dolphin Active 20. Poolbots does not currently stock this part. Contact Poolbots' pool experts by live chat or phone to check your robot model against the compatibility list and confirm the part number.
- Rinse collected debris from the basket after use so it does not build up.
- Check the filter material and basket frame for damage when cleaning.
- Use both your robot model and part number 9991481-R1 when asking Poolbots' pool experts to confirm fit.
Compatibility
Fits these Dolphin robots.
Confirmed by Maytronics' compatibility checker and each robot's own spare-parts list.
Do it yourself
How to replace it at home.
Switch off and unplug the power supply.
Remove the robot from the pool and place it on a stable surface.
Open the filter access and remove the old basket.
Place the replacement basket in position and check that it seats correctly.
Close the filter access, return the robot to the pool and reconnect power.
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
General Info
- Warranty (years)
- 1
Size & Dimension
- Package Dimensions
- 10.8x7.2x8.6 inch
- Gross Weight
- 1.72 lb
Questions
Cartridge Filter S400 Assembly, answered.
Which Dolphin robots are confirmed to fit this basket?
Confirmed models include Dolphin S200, Dolphin Quantum, Dolphin Active 20, Dolphin S300, Dolphin Active 30, Dolphin Proteus DX5i and Dolphin Explorer E30 WiFi. This is not the full list. Ask Poolbots' pool experts to check other models.
Does Poolbots currently stock part 9991481-R1?
Poolbots does not currently stock this part in its store. This page helps you identify it. Contact Poolbots' pool experts by live chat or phone for help confirming the correct part.
What warranty is listed for this part?
The listed part warranty is 1 year.
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