$617.27 – $671.82Price range: $617.27 through $671.82
Our Compact Ultra High Purity Under Sink Reverse Osmosis System – 4 Stage system provides the best in class RO water filtration and alkalises and remineralises your purified water during the final stage of filtration. Our RO systems are NSF certified and have the relevant Australian Watermark certificates for drinking water treatment which means you can be assured that these alkalising under sink RO filters are vetted against the most stringent standards.
Made from superior quality components with the filters all being manufactured in the USA, our 4 stage compact under sink RO systems include final stage alkalisation and quick change cartridges to ensure simple, hygienic, no mess means of system maintenance. This delivers excellent purified water while providing an effortless method to change your RO filters when required. Reverse Osmosis systems are consistently one of the better PFAS water filters and water filters that filters fluoride as well.
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This system meets the WaterMark specification AS/NZS 3497 Drinking water treatment unit – Plumbing requirements.
Certificate Number 52014.




All our under sink water filter taps feature a chrome finish and include a base plate and connection fittings.
* Please Note: the width (W) refers to the dimension from the centre line of the tap body to the centre of the spout.

Standard Spring Loaded faucet with black lever, in a long reach design.
200mm W x 210mm H

Standard Mode faucet in a high loop design.
150mm W x 290mm H

Standard Retro faucet in a high loop design and long reach.
125mm W x 235mm H

Standard Euro faucet in a long reach design.
150mm W x 230mm H

Standard Euro faucet in a high loop design.
150mm W x 230mm H

Standard Metro faucet in a high loop design.
160mm W x 250mm H

Standard Antique faucet in a high loop design.
125mm W x 235mm H

Standard Fin faucet in a long reach design.
135mm W x 250mm H

Standard Side Lever in a high loop design. For hot, cold and filtered Water.
203mm W x 365mm H

Standard Side Lever in a long reach design. For hot, cold and filtered Water.
195mm W x 325mm H
The system requires 2 of these cartridges to be replaced
every 6-12 months
The system requires 1 these cartridges to be replaced
every 3-6 years dependent on water quality.
The system requires 1 these cartridges to be replaced
every 2 years.
The system requires 1 these cartridges to be replaced
every 2 years.
Tap water often harbors an array of impurities and contaminants. Reverse Osmosis Water Filters target the widest range of water impurities imaginable, including harmful substances like PFAS, fluoride and chlorine. Reverse osmosis is uniquely capable of reducing contaminants ranging from bacteria and viruses to agricultural runoff like pesticides and fertilizers to dissolved metals such as lead, arsenic, and iron. Research demonstrates that reverse osmosis technology excels at eliminating trace contaminants, including perfluorocarbons and trace pharmaceutical residues. Enjoy clean, contaminant-free water in your home with our Ultra High Purity Reverse Osmosis System, and have the peace of mind that comes with knowing your water is free from fluoride, chloride, and a wide array of other impurities.

Made from 100% pure Coconut Granular Activated Carbon (GAC) and rigorously tested, it effectively reduces PFAS, Chlorine, Chemicals, Pesticides, Heavy Metals, Taste & Odour. We recommend replacing every 12 months or 7,500L depending on water quality. Made in USA.Pes

Effectively removes up to 99% of PFAS, fluoride, viruses, bacteria and parasites. The membrane screens to 0.0005 micron for pristine drinking water. Designed and made in the USA for maximum filtration, it requires replacement every 3-6 years to maintain optimal performance.

The AlkaHydrate and Omnipure filters raise pH levels, producing antioxidant and oxygenating qualities for healthier water. This high-performance filter ensures enhanced hydration, requiring replacement every 2 years for sustained quality and benefits.
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A reverse osmosis membrane is a thin film with tiny pores that permit only water molecules to pass through, blocking all contaminants. It’s made of a semi-permeable material that allows water flow but blocks dissolved salts, organics, bacteria, and pyrogens. When pressurised, pure water diffuses through the membrane into the permeate flow, leaving contaminants behind. Reverse osmosis removes up to 99% of impurities.
Polluted water is forced through the semi-permeable membrane by mains pressure. Pure water passes easily, while pollutants larger than.0005 microns are washed away into a waste stream that goes down the drain. This waste stream contains all of the filtered-out contaminants, including pesticides, metals, bacteria, and viruses.
Reverse osmosis effectively removes harmful contaminants like cadmium, arsenic, and chromium. However, it also filters out beneficial minerals and salts, resulting in acidic water. For improved health outcomes, raise your water’s pH to an alkaline level by adding healthy minerals back into it. Our Remineraliser Cartridge infuses your water with essential minerals and salts to restore balance and alkalinity.
If remineralisation is not desired our Compact Ultra High Purity Under Sink Reverse Osmosis System – 3 Stage and Ultra High Purity Under Sink Reverse Osmosis System – 4 Stage might be a good alternative.
You can trust this reverse osmosis system to deliver safe, clean water. It meets the stringent WaterMark AS/NZS 3497 standards for structural durability under pressure, certified under number 52014. WaterMark also mandates that all components, including the filter cartridges, comply with NSF/ANSI 42 standards or higher for water filtration safety.
These systems are hand-assembled right here in Australia and wet-tested to guarantee superior quality. Our Watermark certification indicates full compliance with Australian plumbing codes, so you can have total peace of mind knowing your RO system adheres to local regulations.

Important Considerations for Rainwater Filtration
This product is designed specifically for use with municipal water supply systems or well water with adequate pressure. It is not recommended for rainwater filtration due to the waste water component inherent in reverse osmosis systems.
Reverse osmosis water filters require a consistent water pressure of at least 40 psi, which is typically provided by municipal water mains or a dedicated pressure pump. Rainwater collection systems often lack the necessary pressure for the efficient operation of reverse osmosis filters.
For optimal performance and to avoid potential issues, we strongly advise against using this product for rainwater filtration. It is specifically engineered to work seamlessly with traditional water supply sources that meet the required pressure specifications.
Installation of your reverse osmosis system is straightforward with the included guide and complete package of parts. All necessary fittings, tubing, and adapters are provided for a seamless setup.
For step-by-step guidance, refer to the installation manual you will receive with the kit. Additionally, check out our blog post here for tips. With the materials included and these resources, you’ll be able to get your new system up and running smoothly.
We want to ensure your installation experience is easy and stress-free. Please reach out to our support team with any questions!

Our reverse osmosis systems come equipped with colour-coded hoses for intuitive installation.
– Black hose for waste water drainage
– White hose connects to the storage tank
– Red hose for feed water inlet to the system
– Blue hose for filtered water flow to dispensing tap after passing the remineraliser
With each hose distinctly coloured, you’ll know exactly where everything connects once you unpack your system. No guesswork is required!
The colour-coding allows for quick identification of the purpose and flow path of each flexible hose.
With the right hoses in the right places, you’ll be enjoying purified water in no time. Our systems come with everything needed for efficient filtration and refreshing hydration.

Compact Under Sink RO 4-Stage Installation Guide
Faucet Installation Guide
Reverse Osmosis Tank Brochure

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