The iRobot Roomba 780 takes the iRobot Filter 3-Pack (Roomba 700 series) (part 4503461) as its filter; replace it every 2 months; Australian sellers list it from A$23.81 each as of 26 October 2026. Fitment confirmed against the manufacturer's compatibility list.
Your robot vacuum
iRobot Roomba 780
Robot vacuum
Confirmed against iRobot's listConfirmed against iRobot's own compatibility list
Not yours? ChangeSave it · remind me every 2 months
Takes the 4503461 filter
Filter 3-Pack (Roomba 700 series) · replace every 2 months · check the code printed on your old filter before ordering.
Your robot vacuum
Robot vacuum
Confirmed against iRobot's listConfirmed against iRobot's own compatibility list
Takes the 4503461
Filter · every 2 months · check the code on your old filter.
Other iRobot robot vacuums that take the 4503461
GenuineGenuine iRobot
See seller
No genuine seller tracked yetNo genuine seller tracked yet
CompatibleCompatible option
$23.81 each
2-pack $47.62
Amazon AU · 26 OctAmazon AU · checked 26 Oct
Check sellerCheck seller details
Genuine: made by iRobot. Compatible: another brand.Genuine is made by iRobot. Compatible is made by another brand. Check the seller's page for the size and models it fits.
Lowest compatibleLowest compatible price · $23.81 each · 2-pack $47.62
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.
Other parts this robot vacuum takes
- iRobot Bristle Brush (Roomba 600 & 700 series)See the main brush
The main brush. Separate from the filter. Replace every 6 months.
- iRobot Edge-Sweeping Brush 3-Pack (Roomba e, i, j, Combo; also 600–900)Open Amazon AU$13.50
The side brush. Separate from the filter. Replace every 12 months.
Compare 3 sellers
Compare 1 seller
AUD, before delivery. Each price shows when it was checked.
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 filter is due — it's every 2 months. One email two weeks before, no newsletter. Manage or stop it anytime.
How to change the filter in your iRobot Roomba 780
Watch the guide or follow the steps.
No clear video for this part yet. The steps cover it.
- 1Press the bin release button and pull the bin out of the back of the robot.
- 2Empty the bin, then pull the old filter out of the bin.
- 3Push the new filter in and slide the bin back until it clicks.
Every number this part goes by
- Retail name:
- 4503461
Sellers list any of these; they are the same part.
About your iRobot Roomba 780
iRobot robot vacuum — Roomba 700 series. Its filter is the Filter 3-Pack (Roomba 700 series), part 4503461, changed every 2 months.
Also in this robot vacuum: iRobot Bristle Brush (Roomba 600 & 700 series) (every 6 months), iRobot Edge-Sweeping Brush 3-Pack (Roomba e, i, j, Combo; also 600–900) (every 12 months).
Where the model number is: Turn the robot over: the model name and serial are on the label on the underside. The model name is also on the top lid of most robots.
Fits these 4 iRobot models
iRobot4 models
Common questions
- Which filter fits the iRobot Roomba 780?
- The iRobot Roomba 780 takes the iRobot Filter 3-Pack (Roomba 700 series) (part 4503461). Compatible filters made to the same specification also fit.
- How often should I replace the filter in my iRobot Roomba 780?
- Every 2 months. It works less well as the filter fills up, so it's worth doing on time.
- Where can I buy the 4503461 in Australia?
- We track 1 Australian seller for the 4503461; the lowest listed price when we last checked was A$23.81 at Amazon AU. Prices are re-checked daily and dated on this page.
- How do I fit the 4503461 in an iRobot Roomba 780?
- No tools, a few minutes: 3 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 loses suction, worn brushes miss edges, and a stale mop cloth smears rather than cleans.
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