The Maytronics Dolphin S400 takes the Dolphin fine filter panels 9991463-ASSY (set of 4) as its filter; Australian sellers list it from A$140.34 as of 28 October 2026. Fitment confirmed against the manufacturer's compatibility list.
Your pool cleaner
Maytronics Dolphin S400
Pool cleaner
Confirmed against Maytronics's listConfirmed against Maytronics's own compatibility list
Not yours? Change
Takes the 9991463-ASSY filter
Dolphin fine filter panels 9991463-ASSY (set of 4) · check the code printed on your old filter before ordering.
Your pool cleaner
Pool cleaner
Confirmed against Maytronics's listConfirmed against Maytronics's own compatibility list
Takes the 9991463-ASSY
Filter · check the code on your old filter.
Other Maytronics pool cleaners that take the 9991463-ASSY
GenuineGenuine Maytronics
$140.34
Maytronics Australia · 28 OctLowest genuine · Maytronics Australia · checked 28 Oct
CompatibleCompatible option
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No compatible seller tracked yetNo compatible seller tracked yet
Genuine: made by Maytronics. Compatible: another brand.Genuine is made by Maytronics. Compatible is made by another brand. Check the seller's page for the size and models it fits.
Lowest price · $140.34
Maytronics Australia. Every seller we track is listed below. Some links earn us a commission. Some seller links earn us a commission, at no extra cost to you.
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AUD, before delivery. Each price shows when it was checked.
Opens Maytronics Australia in a new tab. Their page is the source of truth for price, delivery and returns.
How long it lasts
Replace it when the mesh is torn, cracked or worn at the edges, or stays brown or green after a deep clean, Maytronics says; rinse it after every cycle and deep-clean it about once a month.
After replacing: No reset needed. Robots with a filter indicator on the power supply or app clear it after the filter is cleaned and a new cycle starts; the manual for your model has the details.
How to change the filter in your Maytronics Dolphin S400
Watch the guide or follow the steps.
- 1Switch off and unplug the power supply. Use the floating cable to bring the robot to the edge, then lift it out by its handle (never by the cable) and let the water drain. On the cordless Liberty 600, take the robot out of the pool and switch it off first.
- 2Open the filter cover; the handle lifts up by itself. Lift out the filter basket and open the latch to release the bottom lid and empty the debris.
- 3Hold the basket handle and lift out the inner net basket.
- 4Press out the 4 panels in order, starting with panel 1, then 2, 3 and 4.
- 5Fit the new panels in reverse order: 4, 3, 2, then 1. Do not force them into place.
- 6Refit the inner net basket, put the basket back and close the filter cover.
Every number this part goes by
- Retail name:
- 9991463
- Retail name:
- 9991463-ASSY
- Retail name:
- 9991463-R4
Sellers list any of these; they are the same part.
About your Maytronics Dolphin S400
Maytronics pool cleaner — Dolphin S Line (S2 platform). Its filter is the Dolphin fine filter panels 9991463-ASSY (set of 4), part 9991463-ASSY.
Other filters the maker lists for this pool cleaner:
- Dolphin rough filter insert 9983106. Rough filter insert: sits in the basket to catch leaves and large debris before the finer panels; use it when the pool is full of leaves.
- Dolphin ultra-fine filter panels 9991467-ASSY (set of 4). Ultra-fine panels: for silt, fine dust and tiny particles. Maytronics says they get the water cleaner but shorten cleaning cycles because water passes through more slowly.
Where the model number is: On a robot the model is on the label on the cleaner's body, often underneath, or on its power supply; unplug the power supply and lift the robot out of the pool before you turn it over. On a Polaris pressure cleaner it is on the body and the box.
Fits these 11 Maytronics models
Maytronics11 models
Dolphin Active X6. Maytronics names the X6 for these fine panels and the rough insert, but not for the ultra-fine panels.
Common questions
- Which filter fits the Maytronics Dolphin S400?
- The Maytronics Dolphin S400 takes the Dolphin fine filter panels 9991463-ASSY (set of 4).
- Where can I buy the 9991463-ASSY in Australia?
- We track 2 Australian sellers for the 9991463-ASSY; the lowest listed price when we last checked was A$140.34 at Maytronics Australia. Prices are re-checked daily and dated on this page.
- How do I fit the 9991463-ASSY in a Maytronics Dolphin S400?
- No tools, a few minutes: 6 steps, listed on this page with the replacement video where the maker has one.
- What happens if I don't change it?
- A clogged filter slows the cleaner and it picks up less; a torn one lets fine dirt pass straight back into the water.
- Is there anything to reset afterwards?
- No reset needed. Robots with a filter indicator on the power supply or app clear it after the filter is cleaned and a new cycle starts; the manual for your model has the details.
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