The Billi OmniOne takes the Billi 5 micron Fibron X replacement filter 994051 as its water filter; replace it every 12 months; Australian sellers list it from A$189.00 as of 26 October 2026. Fitment confirmed against the manufacturer's compatibility list.
Your filtered water tap
Billi OmniOne
Tap or under-sink system
Confirmed against Billi's listConfirmed against Billi's own compatibility list
Not yours? ChangeSave it · remind me every 12 months
Takes the 994051 water filter
5 micron Fibron X replacement filter 994051 · replace every 12 months · check the code printed on your old filter before ordering.
Your filtered water tap
Tap or under-sink system
Confirmed against Billi's listConfirmed against Billi's own compatibility list
Takes the 994051
Water filter · every 12 months · check the code on your old filter.
Other Billi filtered water taps that take the 994051
GenuineGenuine Billi
$189.00
eBay AU · 26 OctLowest genuine · eBay AU · checked 26 Oct
CompatibleCompatible option
See seller
No compatible seller tracked yetNo compatible seller tracked yet
Genuine: made by Billi. Compatible: another brand. Check certification on the seller's page.Genuine is made by Billi. Compatible is made by another brand. Check the seller's certification details before choosing.
Lowest price · $189.00
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Compare 6 sellers
AUD, before delivery. Each price shows when it was checked.
Genuine Billi
6 sellers
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Not due yet?
Get a nudge when your water filter is due — it's every 12 months. One email two weeks before, no newsletter. Manage or stop it anytime.
How to change the water filter in your Billi OmniOne
Watch the guide or follow the steps.
- 1Take the front panel off the under-bench unit (OmniOne and Home BCS: open the filter cover marked OPEN HERE).
- 2Release the pressure. Eco, Sahara, Alpine 125, Home BC, Home BA, Home B5000 Sparkling, Eco Sparkling and Quadra Sparkling: press the Pressure Relief button once. Other Quadra models: hold ON/OFF until the screen shows OVERRIDE OFF. OmniOne and Home BCS: press CHANGE FILTER. Home CS and Alpine Sparkling: turn off the blue tap under the bench and use the lever to release the pressure. Alpine 60/120, Home C, Home FT and Filter Tap: turn the water off at the wall, set the temperature control to OFF and open the tap.
- 3Hold the bottom of the filter, swing it towards you about 30 degrees, then pull it straight down out of the cradle. Wipe up any water in the tray.
- 4Remove the cardboard or foam spacer from under the new filter, push it right up into the cradle and swing it back until it locks.
- 5Flush: Quadra (not Sparkling), OmniOne and Home BCS flush themselves. Home CS and Alpine Sparkling: turn the blue tap back on and flush for 3 minutes. Alpine 60/120, Home C, Home FT and Filter Tap: turn the water back on and run the tap 2–3 minutes. All others, Quadra Sparkling included: run the chilled side until the flow stops, wait 10 minutes and repeat twice. Check for leaks and refit the panel.
Every number this part goes by
- Retail name:
- 994051
- Replaces:
- 994001
Sellers list any of these; they are the same part.
About your Billi OmniOne
Billi filtered water tap, tap or under-sink system — Billi OmniOne. Its water filter is the 5 micron Fibron X replacement filter 994051, part 994051, changed every 12 months.
Other water filters the maker lists for this filtered water tap: Billi 0.2 micron Fibron XC replacement filter 994052 (every 12 months). Billi's 0.2 micron filter also fits; Billi suggests it for homes and critical-care sites. The 5 micron 994051 is supplied as standard.
Where the model number is: On a boiling or chilled water tap the model is on the label on the unit under the bench, not on the tap itself. On an under-sink system it is on the filter head or housing; the cartridge code is printed on the old cartridge.
Fits these 20 Billi models
Billi20 models
Eco Sparkling, Quadra Sparkling. Billi's guide for this sparkling model says to change the filter every 6 months, sooner than the 12 months shown for the cartridge.
FT Filter Tap, Home B5000 Sparkling, Home BA, Home BC, Home BCS, Home C, Home CS, Home FT. Billi's 5 micron filter also fits; Billi suggests it for high-use sites. The 0.2 micron 994052 is supplied as standard.
Common questions
- Which water filter fits the Billi OmniOne?
- The Billi OmniOne takes the Billi 5 micron Fibron X replacement filter 994051.
- How often should I replace the water filter in my Billi OmniOne?
- Every 12 months. Flow slows and performance drops off as the filter fills up, so it's worth doing on time.
- Where can I buy the 994051 in Australia?
- We track 6 Australian sellers for the 994051; the lowest listed price when we last checked was A$189.00 at eBay AU. Prices are re-checked daily and dated on this page.
- How do I fit the 994051 in a Billi OmniOne?
- 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 carbon stops reducing chlorine taste and odour and the flow from the tap slows as the cartridge clogs; a boiling-water tap with a scale-reducing filter builds scale in its tank faster.
- How do I reset the reminder?
- Billi's guides give no separate reset step: the filter monitor counts cups and days, and Billi's service line (1800 812 321) can reprogram the interval if needed.
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