OneWater under-sink reverse osmosis system

UNDER-SINK REVERSE OSMOSIS

Product Details

Product information, pricing, and purchase options

Images

Starting from $18/week

Flexible fortnightly payments

Standard faucet included

Filters to 0.0001 Microns — Advanced reverse osmosis membrane technology removes up to 99% of dissolved contaminants, including PFAS, fluoride, lead, arsenic, nitrates, heavy metals and Total Dissolved Solids (TDS).

The Gold Standard in Drinking Water Purification — Widely recognised as one of the most effective residential water filtration technologies available, delivering exceptionally pure drinking water.

The Gold Standard of Drinking Water

THE RO SYSTEM, EXPLAINED

STAGE 4
STAGE 4

The RO filter comes standard in our packages and excels in fluoride and PFA removal. It adjusts TDS to deliver distilled water via a 2-way faucet, with a 3-way optional available. Ideal for baby formula, CPCP machines, and PFA risk reduction.

STAGE 5
STAGE 5

The T33 post-carbon filter enhances water taste and removes residual odours. It's a standard feature in our packages offering the final polish to your water for improved flavour and clarity after the RO filter. Ideal for cooking, beverages, and ensuring a pleasant water experience.

Stage 6 remineralisation filter
STAGE 6
  • ALKALINE BALLS
    ALKALINE BALLSEffect: Adds trace minerals back into the water, raising pH and softening the taste.
  • ANTIBACTERIAL BALLS
    ANTIBACTERIAL BALLSEffect: Inhibits bacterial growth in the water as it passes through.
  • SMALL MOLECULAR BALLS
    SMALL MOLECULAR BALLSEffect: Mineral media that conditions the water and softens the taste.
  • MAIFAN STONE
    MAIFAN STONEMaifan mineral stone — adds trace minerals as water passes through.

Faucet Options

One tap, or two
your choice

Every reverse osmosis system comes with its own dedicated faucet, included as standard. If you'd rather not add a second tap to the sink, a 3-way mixer replaces your existing tap entirely — hot, cold and filtered water from one outlet.

Included as standard

Dedicated tap

Dedicated tap

A slimline tap installed alongside your existing mixer, dispensing filtered water only. Your current tap stays exactly as it is.

+$449

Upgrade option

3-way mixer

3-way mixer

Replaces your existing kitchen tap. One outlet delivers hot, cold and filtered water, with a separate handle for the filtered line.

Optional upgrade: 3-Way Mixer Options

Your Reverse Osmosis system comes with a standard faucet. Prefer a designer 3-way mixer? Choose a finish to add one.

Dimensions

RO system

Height

20 cm

Length

30 cm

Width

8 cm

Pressure tank

Height

34 cm

Length

23 cm

Width

23 cm

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The OneWater Under-Sink Reverse Osmosis System delivers bottled-quality drinking water from a dedicated tap at your kitchen sink. Its multi-stage membrane reduces up to 99% of contaminants — including PFAS, microplastics, chlorine, heavy metals and dissolved solids. Every system includes the under-sink unit, a standard faucet (with optional designer upgrades), professional installation by a licensed plumber, the first annual filter service and lifetime support from the OneWater team.