Home water filtration systems in Australia
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Philips FastFlow AUT9333/79 under-sink filter with tap
WaterMark-listed, certified under-sink filtration at the kitchen tap, where the drinking water actually is.
$299 at Bunnings, checked 22 Oct 2026 · Amazon's price is on its page
Paid links: we may earn a commission. As an Amazon Associate I earn from qualifying purchases. It doesn't change which product is here.
Whole-house, under-sink, benchtop or reverse osmosis: the four ways to filter a home's water in Australia, what each costs to buy and run, and how to pick one.
Our picks at a glance
| Product | Best for most homesPhilips FastFlow AUT9333/79 under-sink filter with tap $299 at Bunnings | Best for tank waterStefani Twin stage under-sink filtration system, lead free $159 at Bunnings | Best whole-houseStefani 4.5 x 20 inch twin whole-of-house lead-free system $492 at Bunnings | Best for fluoride and dissolved solidsPhilips 75 GPD reverse osmosis tap water station with remineraliser $499 at Bunnings | Best for rentersStefani 10L glazed ceramic gravity water filter $99 at Bunnings |
|---|---|---|---|---|---|
| Install | Licensed plumber, with its own filter tap | Plumbed, licensed plumber recommended | On the mains inlet, licensed plumber | Plumbed, licensed plumber | Sits on the bench: gravity, no power |
| Stages | — | 2 (sediment then carbon) | 2 (5 micron sediment, 5 micron carbon block) in 4.5 x 20 inch big-blue housings | — | — |
| Why it's here | WaterMark-listed, certified under-sink filtration at the kitchen tap, where the drinking water actually is. | Sediment then carbon, in standard housings with cheap cartridges. | WaterMark-listed sediment and carbon for every tap, in 20 inch big-blue housings with cartridges at Bunnings. | Reverse osmosis, WaterMark-listed so a plumber can fit it, from Bunnings or Amazon. | No plumbing at all. |
| Watch out for | Replacement cartridge price not published in Australia when we checked (22 Oct 2026) | Filters grit and improves taste but doesn't disinfect: get untreated tank or bore water tested before you drink it | Big and heavy; needs a solid wall and room to swing a housing wrench | A tank system, so it fills the cupboard and sends water to the drain like any tank RO | Slow: fills over hours, not minutes |
| Buy | Today's price on Amazon$299 at Bunnings | $159 at Bunnings$181 at Stefani | $492 at Bunnings | Today's price on Amazon$499 at Bunnings | $99 at Bunnings$99 at Mitre 10 (may need ordering in) |
WaterMark-listed, certified under-sink filtration at the kitchen tap, where the drinking water actually is.
WaterMark-listed, certified under-sink filtration at the kitchen tap, where the drinking water…
Watch out: Replacement cartridge price not published in Australia when we checked (22 Oct 2026)
- Install: Licensed plumber, with its own filter tap
$299 at Bunnings, checked 22 Oct 2026 · Amazon's price is on its page
Sediment then carbon, in standard housings with cheap cartridges.
Sediment then carbon, in standard housings with cheap cartridges.
Watch out: Filters grit and improves taste but doesn't disinfect: get untreated tank or bore water…
- Install: Plumbed, licensed plumber recommended
- Stages: 2 (sediment then carbon)
$159 at Bunnings · checked 21 Oct 2026
WaterMark-listed sediment and carbon for every tap, in 20 inch big-blue housings with cartridges at Bunnings.
WaterMark-listed sediment and carbon for every tap, in 20 inch big-blue housings with…
Watch out: Big and heavy; needs a solid wall and room to swing a housing wrench
- Install: On the mains inlet, licensed plumber
- Stages: 2 (5 micron sediment, 5 micron carbon block) in 4.5 x 20 inch big-blue housings
$492 at Bunnings · checked 9 Nov 2026
Reverse osmosis, WaterMark-listed so a plumber can fit it, from Bunnings or Amazon.
Reverse osmosis, WaterMark-listed so a plumber can fit it, from Bunnings or Amazon.
Watch out: A tank system, so it fills the cupboard and sends water to the drain like any tank RO
- Install: Plumbed, licensed plumber
$499 at Bunnings, checked 9 Nov 2026 · Amazon's price is on its page
No plumbing at all.
No plumbing at all.
Watch out: Slow: fills over hours, not minutes
- Install: Sits on the bench: gravity, no power
$99 at Bunnings · checked 9 Nov 2026
How we picked: We picked these 5 from the water filters sold in Australia, judged on install, stages and price, using maker specs, Australian retailer prices and owner reports. We haven't tested them hands-on yet, and maker claims are labelled as theirs. Commission never puts a worse product ahead of a better one, but between equal products or shops, one that pays us can go first. Full method.
“Home filtration system” covers four very different products. Picking the wrong category is the expensive mistake, not picking the wrong brand.
The four types
Point of use, unplumbed. Jugs, on-tap units, benchtop gravity filters, countertop reverse osmosis. No plumber, nothing permanent, and the right answer for renters. $19 to $500.
Point of use, plumbed. An under-sink filter on the cold line at the kitchen tap. This is what most home owners should buy: it filters the water you actually drink, at full flow, and the finer media that would choke a whole-house system works fine here. From $125 for a WaterMark-listed system, plus a licensed plumber. Online units that aren’t on the WaterMark register can’t legally be fitted by a plumber.
Point of entry, or whole house. A sediment and carbon system on the mains inlet, treating every tap, shower and appliance. Necessary on tank, bore or dam water. It cannot remove fluoride or dissolved solids, and it uses coarser media than a kitchen filter. Expect a bigger plumbing job too.
Reverse osmosis. Under the sink or on the bench. The only common home treatment that removes fluoride, dissolved solids and most chemicals. Slow, sends water to the drain, and strips minerals. $235 to $500.
How to choose in three questions
- Can you plumb anything in? No means benchtop, on-tap or countertop reverse osmosis. Yes means the rest are open.
- Where does your water come from? Town water means a kitchen filter is enough. Tank, bore or dam means a whole-house sediment stage first, then a fine filter for drinking.
- What are you trying to remove? Taste and chlorine means any carbon filter. Chloramine means catalytic carbon, and matters in Brisbane and Adelaide. Fluoride or dissolved solids means reverse osmosis. Scale means a softener, which is not a filter at all.
Running cost is the real number
Over three years, cartridges usually cost more than the system. Standard 10 inch housings take generic cartridges from any brand and are the cheapest to run. Proprietary cartridges are convenient and the maker sets the price. The full breakdown is in the cartridge guide.
By city
What is in your supply decides the media: see Australian tap water by city.
Where to buy our picks
- Philips FastFlow AUT9333/79 under-sink filter with tapSee today's price on Amazon
- Stefani Twin stage under-sink filtration system, lead free$159 at Bunnings
- Stefani 4.5 x 20 inch twin whole-of-house lead-free system$492 at Bunnings
- Philips 75 GPD reverse osmosis tap water station with remineraliserSee today's price on Amazon
- Stefani 10L glazed ceramic gravity water filter$99 at Bunnings
Paid links: we may earn a commission. As an Amazon Associate I earn from qualifying purchases. Prices change; the shop's page is the final word.
The picks in detail
Tap a pick for its full specs, pros and cons and every shop.
Best for most homesPhilips FastFlow AUT9333/79 under-sink filter with tap
$299 at Bunnings · checked 22 Oct 2026Specs, pros and cons, all 2 shops
WaterMark-listed, certified under-sink filtration at the kitchen tap, where the drinking water actually is.
- Certification: NSF/ANSI 53 for PFAS (PFOS and PFOA), 42 for chlorine, 401 for microplastics, plus 372 (Philips and Bunnings listings, 31 Oct 2026)
- WaterMark: Yes, licence 060212
- Install: Licensed plumber, with its own filter tap
- Cartridge life: 7,268 L or 12 months (Philips, Bunnings listing); certified for 1,925 US gal
- Yearly running cost: Not published in Australia when we checked (22 Oct 2026)
Pros
- The only under-sink filter we compared with both WaterMark and NSF/ANSI 53 certification
- Certified for PFAS, not just chlorine
- Its own filter tap, so your mixer stays as it is
Cons
- Replacement cartridge price not published in Australia when we checked (22 Oct 2026)
- Needs a plumber and a hole for the tap
Paid links: we may earn a commission. As an Amazon Associate I earn from qualifying purchases. Price checked 22 Oct 2026.
Best for tank waterStefani Twin stage under-sink filtration system, lead free
$159 at Bunnings · checked 21 Oct 2026Specs, pros and cons, all 2 shops
Sediment then carbon, in standard housings with cheap cartridges.
- Stages: 2 (sediment then carbon)
- Housing: Standard 10 inch, lead-free
- Install: Plumbed, licensed plumber recommended
- Cartridge life: About 6 to 12 months
- Certification: No NSF/ANSI listing shown
- Yearly running cost: About $62: PP-0510 ($8.85) and 102 ($22) twice a year (Bunnings)
- WaterMark: Yes, licence 022200 (certified to WMTS-103)
Pros
- Sediment pre-filter protects the carbon stage and suits tank or bore water
- Generic 10 inch cartridges keep running costs low
Cons
- Filters grit and improves taste but doesn't disinfect: get untreated tank or bore water tested before you drink it
- Takes more cupboard space than an inline unit
- Needs a plumber
Paid links: we may earn a commission. Price checked 21 Oct 2026.
Best whole-houseStefani 4.5 x 20 inch twin whole-of-house lead-free system
$492 at Bunnings · checked 9 Nov 2026Specs, pros and cons and where to buy
WaterMark-listed sediment and carbon for every tap, in 20 inch big-blue housings with cartridges at Bunnings.
- Stages: 2 (5 micron sediment, 5 micron carbon block) in 4.5 x 20 inch big-blue housings
- Install: On the mains inlet, licensed plumber
- Flow rate: Not stated on the listing
- Filter life: Not stated on the listing
- Certification: WaterMark certified, lead-free (listing)
- WaterMark: Yes, licence 022200 (model WHF-T20-LF)
- Fitting: 4.5 x 20 inch big-blue housings on the mains or tank inlet (port size not stated on the listing)
Pros
- 20 inch housings double cartridge life compared with the 10 inch twin
- Standard big-blue size, so catalytic carbon or softening resin cartridges fit the second housing
- WaterMark certified and sold at Bunnings with cartridges on the shelf
Cons
- Big and heavy; needs a solid wall and room to swing a housing wrench
- Stefani 20 inch cartridges cost $64 to $135 each at Bunnings
Paid links: we may earn a commission. Price checked 9 Nov 2026.
Best for fluoride and dissolved solidsPhilips 75 GPD reverse osmosis tap water station with remineraliser
$499 at Bunnings · checked 9 Nov 2026Specs, pros and cons, all 2 shops
Reverse osmosis, WaterMark-listed so a plumber can fit it, from Bunnings or Amazon.
- Output: 75 GPD
- Remineraliser: Yes
- Install: Plumbed, licensed plumber
- Certification: WaterMark, licence 060214
- WaterMark: Yes, licence 060214
- Yearly running cost: About $215 to $335 at Philips RRP (AUT515, AUT514, AUT521 sets)
Pros
- RO with remineralisation from a brand you can buy in-store
- Bunnings warranty and returns
Cons
- A tank system, so it fills the cupboard and sends water to the drain like any tank RO
Paid links: we may earn a commission. As an Amazon Associate I earn from qualifying purchases. Price checked 9 Nov 2026.
Best for rentersStefani 10L glazed ceramic gravity water filter
$99 at Bunnings · checked 9 Nov 2026Specs, pros and cons, all 2 shops
No plumbing at all.
- Capacity: 10 L
- Filter: Ceramic candle with activated carbon; Stefani lists its low-pressure 7 and 7GR candles as replacements
- Candle life: About 6 months (Stefani); scrub it clean between changes
- Install: Sits on the bench: gravity, no power
- Certification: None shown on the Bunnings or Mitre 10 listings (22 Oct 2026)
- Yearly running cost: About $65 a year per candle: Bunnings' Stefani Aqua Endura gravity candle is $32.50 (25 Oct 2026). The listings don't say how many candles the 10 L takes
Pros
- No plumbing, no power, no cartridges to click in
- Glazed ceramic body, sold at Bunnings and Mitre 10
Cons
- Slow: fills over hours, not minutes
- Takes bench space
- Candle needs scrubbing every few weeks
- Neither retailer says how many candles it takes; check the box in store
Paid links: we may earn a commission. Price checked 9 Nov 2026.
Frequently asked questions
Do I need a whole-house water filtration system?
Usually not on town water. A whole-house system treats every tap, shower and appliance, which matters on tank, bore or dam water, or where you want chlorine out of every shower. For drinking-water taste alone, a filter at the kitchen tap costs a tenth as much and does more, because it can use finer media.
How much does a home water filtration system cost in Australia?
A benchtop or on-tap filter is $50 to $150 with no installation. A WaterMark-listed under-sink system starts at $125 (the Stefani single at Bunnings, checked 21 October 2026) plus a licensed plumber, typically a couple of hundred dollars. A whole-house system costs more and needs a larger plumbing job. Reverse osmosis typically runs to a few hundred dollars plus installation. Cartridges then cost $20 to $200 a year depending on the type.
What is the best water filtration system for a house in Australia?
For most homes on town water: a certified under-sink carbon filter at the kitchen tap, plus a shower filter if the supply is chloraminated. For tank or bore water: a whole-house sediment and carbon system, with a fine filter at the kitchen tap for drinking. For fluoride or high dissolved solids, as in Adelaide and Perth: reverse osmosis at the kitchen tap.