The Melitta Avanza takes the Melitta PRO AQUA filter cartridge (part 6784658) as its water filter; replace it every 2 months; Australian sellers list it from A$23.00 as of 26 October 2026. Fitment confirmed against the manufacturer's compatibility list.

Your coffee machine
Melitta Avanza
Confirmed against Melitta's listConfirmed against Melitta's own compatibility list
Not yours? ChangeSave it · remind me every 2 months
Takes the 6784658 water filter
PRO AQUA filter cartridge · replace every 2 months · check the code printed on your old filter before ordering.

Your coffee machine
Confirmed against Melitta's listConfirmed against Melitta's own compatibility list

Takes the 6784658
Water filter · every 2 months · check the code on your old filter.
Other Melitta coffee machines that take the 6784658
GenuineGenuine Melitta
$23.00
Amazon AU · 26 OctLowest genuine · Amazon AU · checked 26 Oct
CompatibleCompatible option
See seller
No compatible seller tracked yetNo compatible seller tracked yet
Genuine: made by Melitta. Compatible: another brand. Check certification on the seller's page.Genuine is made by Melitta. Compatible is made by another brand. Check the seller's certification details before choosing.
Lowest price · $23.00
Amazon AU. 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.
Other parts this coffee machine takes
- Melitta ANTI CALC liquid descaler for automatic coffee machines 250 mlOpen Amazon AU$18.95
The descaler. Descale when the machine asks for the descaling programme.
- Melitta PERFECT CLEAN cleaning tabs (4)Open Amazon AU$12.00
The coffee machine cleaner. Clean when the machine asks for the cleaning programme; one tab each time.
Compare 2 sellers - Melitta PERFECT CLEAN milk system cleaner 250 mlOpen Amazon AU$13.00
The milk system cleaner. Clean the milk system when the machine asks for the milk system cleaning programme.
Compare 2 sellers
Compare 3 listings from 2 sellers
AUD, before delivery. Each price shows when it was checked.
Genuine Melitta
3 listings from 2 sellers
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 water filter is due — it's every 2 months. One email two weeks before, no newsletter. Manage or stop it anytime.
How to change the water filter in your Melitta Avanza
Watch the guide or follow the steps.
No clear video for this part yet. The steps cover it.
- 1Stand the new cartridge in a jug of fresh tap water for a few minutes.
- 2Display models (Barista, Passione, Varianza, CI Touch): open the menu, go to Care > Filter > Insert filter (or Change filter) and press Start.
- 3Button models (Purista, Latticia, Avanza): hold the Service or Water/Service button for 2 seconds and step to the Filter function.
- 4Follow the machine: empty the tank, screw the cartridge into the bottom of the tank, fill with fresh water and let the filter programme run.
- 5Change it every 2 months, or sooner when the machine asks.
Every number this part goes by
- Retail name:
- 192830
- Retail name:
- 4006508192830
- Retail name:
- 6784658
- Retail name:
- Melitta Pro Aqua
- Retail name:
- Pro Aqua
- Retail name:
- PRO AQUA
Sellers list any of these; they are the same part.
About your Melitta Avanza

Melitta coffee machine — Avanza. Its water filter is the PRO AQUA filter cartridge, part 6784658, changed every 2 months.
Also in this coffee machine: Melitta ANTI CALC liquid descaler for automatic coffee machines 250 ml, Melitta PERFECT CLEAN cleaning tabs (4), Melitta PERFECT CLEAN milk system cleaner 250 ml.
Where the model number is: The model number is usually on a sticker on the underside or back of the machine.
Fits these 10 Melitta models
Common questions
- Which water filter fits the Melitta Avanza?
- The Melitta Avanza takes the Melitta PRO AQUA filter cartridge (part 6784658).
- How often should I replace the water filter in my Melitta Avanza?
- Every 2 months. Flow slows and performance drops off as the filter fills up, so it's worth doing on time.
- Where can I buy the 6784658 in Australia?
- We track 2 Australian sellers for the 6784658; the lowest listed price when we last checked was A$23.00 at Amazon AU. Prices are re-checked daily and dated on this page.
- How do I fit the 6784658 in a Melitta Avanza?
- 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?
- The filter stops softening the water, scale builds in the boiler, and the machine asks to be descaled more often; taste in the cup drops off too.
- How do I reset the filter light?
- Register the new filter in the menu (Care > Filter > Insert filter or Change filter on display models; Service mode on button models). The Filter light then resets.
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