The Litter-Robot 3 Open Air takes the Litter-Robot carbon filters LR3-CF-6PK for the Litter-Robot 3 (6-pack) as its carbon filter; replace it every month; Australian sellers list it from A$2.75 each as of 28 October 2026. Fitment confirmed against the manufacturer's compatibility list.
Your litter box
Litter-Robot 3 Open Air
Self-cleaning litter box
Confirmed against Litter-Robot's listConfirmed against Litter-Robot's own compatibility list
Not yours? ChangeSave it · remind me every month
Takes the LR3-CF-6PK carbon filter
carbon filters LR3-CF-6PK for the Litter-Robot 3 (6-pack) · replace every month · check the code printed on your old filter before ordering.
Your litter box
Self-cleaning litter box
Confirmed against Litter-Robot's listConfirmed against Litter-Robot's own compatibility list
Takes the LR3-CF-6PK
Carbon filter · every month · check the code on your old filter.
Other Litter-Robot litter boxes that take the LR3-CF-6PK
GenuineGenuine Litter-Robot
$14.17 each
6-pack $85.00
Cat Evolution · 30 OctLowest genuine · Cat Evolution · checked 30 Oct
CompatibleCompatible option
$2.75 each
8-pack $22.00
Amazon AU · 28 OctAmazon AU · checked 28 Oct
Check sellerCheck seller details
Genuine: made by Litter-Robot. Compatible: another brand.Genuine is made by Litter-Robot. Compatible is made by another brand. Check the seller's page for the size and models it fits.
Lowest compatibleLowest compatible price · $2.75 each · 8-pack $22.00
Amazon AU. Compare with genuine below. Some links earn us a commission. Some seller links earn us a commission, at no extra cost to you.
This litter box also takes a waste drawer liner
Compare 3 listings from 2 sellers
AUD, before delivery. Each price shows when it was checked.
Compatible options
2 listings from 1 seller
Opens Amazon AU in a new tab. Their page is the source of truth for price, delivery and returns.
Not due yet?
Get a nudge when your carbon filter is due — it's every month. One email two weeks before, no newsletter. Manage or stop it anytime.
How to change the carbon filter in your Litter-Robot 3 Open Air
Watch the guide or follow the steps.
- 1Pull out the waste drawer. The carbon filter sits in the slot in the drawer's front wall.
- 2Push the top edge of the old filter down to free it from the hooks, pull it out of the slot and throw it away.
- 3Slide the new filter into the slot in the front wall.
- 4Bend the top edge and slide it under each hook so the filter covers the front vent completely. A little shedding is normal; wipe or vacuum it up.
- 5Slide the waste drawer back in.
Every number this part goes by
- Retail name:
- Litter-Robot 3 Carbon Filters
- Retail name:
- Litter-Robot III Carbon Filters
- Retail name:
- LR3 carbon filter
- Retail name:
- LR3-CF-2PK
- Retail name:
- LR3-CF-6PK
- Retail name:
- LR3-CF-6PK-PP-INTL
Sellers list any of these; they are the same part.
About your Litter-Robot 3 Open Air
Litter-Robot litter box, self-cleaning litter box — Litter-Robot 3. Its carbon filter is the carbon filters LR3-CF-6PK for the Litter-Robot 3 (6-pack), part LR3-CF-6PK, changed every month.
Other carbon filters the maker lists for this litter box: Litter-Robot carbon filter and seal strip kit LR3-CFSS for the Litter-Robot 3 (every month). Whisker's kit with two carbon filters and a set of base seal strips.
Also in this litter box: Litter-Robot waste drawer liners LR2-DL-50 (50).
Where the model number is: The model name is on the maker's label on the back or base of the unit, on the box, and in the maker's app if it has one. Unplug the unit before you move it to look.
Fits these 2 Litter-Robot models
Litter-Robot2 models
Common questions
- Which carbon filter fits the Litter-Robot 3 Open Air?
- The Litter-Robot 3 Open Air takes the Litter-Robot carbon filters LR3-CF-6PK for the Litter-Robot 3 (6-pack). Compatible filters made to the same specification also fit.
- How often should I replace the carbon filter in my Litter-Robot 3 Open Air?
- Every month. It works less well as the filter fills up, so it's worth doing on time.
- Where can I buy the LR3-CF-6PK in Australia?
- We track 2 Australian sellers for the LR3-CF-6PK; the lowest listed price when we last checked was A$2.75 at Amazon AU. Prices are re-checked daily and dated on this page.
- How do I fit the LR3-CF-6PK in a Litter-Robot 3 Open Air?
- No tools, a few minutes: 5 steps, listed on this page with the replacement video where the maker has one.
- What happens if I don't change it?
- A spent filter or deodoriser stops holding the smell in, and a full or worn liner or tray lets waste stick and smell.
- Is there anything to reset afterwards?
- No reset needed.
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