• Under Sink Reverse Osmosis System with Alkalisation 5 Stage

Ultra High Purity Under Sink Reverse Osmosis System – 5 Stage

  • Removes Chlorine, Fluoride, Heavy Metals, Bacteria, Cysts
  • NSF certified and Watermark approved
  • Filters Made in USA
  • Handbuilt in Australia and Wet-Tested before sale
  • Easy Maintenance with hygienic twist-off cartridges
  • With Alkaliser and Remineraliser
  • Including 5L storage tank (upgrades available)
  • Including stylish “Retro High Loop” tap, upgrades available
  • 5 year warranty


Our 5 stage under sink reverse osmosis 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 5 stage alkalising under sink RO systems include final stage alkalisation and quick change cartridges. 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 water filters that filters fluoride as well.

  • Sediment Pre-Filter (Made in USA) – Mechanical filtration removes fine sediment particles.
  • Carbon Pre-Filter (Made in USA) – Removes chlorine, pesticides, heavy metals and other organic pollutants.
  • Ultrafine TFC RO Membrane (Made in USA) – Screens to 0.0005 micron, filtering viruses, bacteria and parasites.  Also removes Fluoride and Hydrocarbons.
  • Coconut Carbon Post-Filter (Made in USA)– The final polishing filter that delivers outstanding, clean, purified water.
  • Alkalising Filter – AlkaHydrate Alkalising and remineralising filter – adds cionic minerals such as Calcium, Magnesium, Potassium and more.  Raises pH and lowers Oxidation Reduction Potential.
  • RO System includes 5 litre storage to enable you to dispense your filtered water on demand.
  • This installation of this under sink RO system requires basic plumbing skills and drilling a hole in order to mount of the filtered water tap.


  • Max filter output of approximately 200 litres per day.
  • RO Filter system dimensions 320W x 420H x 110D mm.
  • 5 litre storage tank, dimensions 317W x 203D mm.
  • Micron rating: 0.005 micron
  • 5 Year Warranty

Replacement filter details can be found here.

Replacement tank details can be found here.

Choose the tap for your under sink water filter

Retro with High Loop $0.00 Spring Loaded Black Lever Chrome +$16.00 Metro with High Loop Chrome +$19.00 Antique with High Loop +$19.00 Fin with Long Reach +$24.00 Mode with high Loop +$36.00 Euro with High Loop +$56.00 Euro with Long Reach +$56.00
Reverse Osmosis Tank 5 Litre $0.00 Reverse Osmosis Tank 8 Litre +$77.00 Reverse Osmosis Tank 11 Litre +$88.00

$790.00 inc. GST


Certified Under Sink Water Filtration

This system meets the WaterMark specification AS/NZS 3497:1998 Amdt 1 2001 Drinking water treatment unit – Plumbing requirements.
Certificate Number 23124.

WaterMark Certification
NSF Certification
RO Under Sink Installation Diagram
RO Under Sink Tee Piece & Drain Clamp

Choose Your Under Sink Water Filter Tap

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.

Chrome Spring Loaded Faucet with Black Lever

Spring Loaded with Long Reach

Standard Spring Loaded faucet with black lever, in a long reach design.

200mm W x 210mm H

Chrome Mode Faucet with High Loop


Standard Mode faucet in a high loop design.

150mm W x 290mm H

Chrome Retro Faucet with High Loop and Long Reach


Standard Retro faucet in a high loop design and long reach.

125mm W x 235mm H

Chrome Euro Faucet with Long Reach

Euro with Long Reach

Standard Euro faucet in a long reach design.

150mm W x 230mm H

Chrome Euro Faucet with High Loop

Euro with High Loop

Standard Euro faucet in a high loop design.

150mm W x 230mm H

Chrome Metro Faucet with High Loop


Standard Metro faucet in a high loop design.

160mm W x 250mm H

Chrome Antique Faucet with High Loop


Standard Antique faucet in a high loop design.

125mm W x 235mm H

Chrome Fin Faucet with Long Reach


Standard Fin faucet in a long reach design.

135mm W x 250mm H

Replacement Filter Cartridges for
5 Stage Under Sink Reverse Osmosis System

1st Stage Omnipure Sediment Pre Filter Block WL5605

The system requires 1 of these cartridges to be replaced every 6-12 months.

2nd & 4th Stage Omnipure GAC Carbon Filter WL5640

The system requires 2 of these cartridges to be replaced every 12 months.

3rd Stage Omnipure Reverse Osmosis Replacement Membrane WL5572

The system requires 1 these cartridges to be replaced every 3-6 years dependent on water quality.

5th Stage AlkaHydrate Alkalising & Remineralising Cartridge

The system requires 1 these cartridges to be replaced every 2 years.

Transform your tap water into refreshing, purified drinking water for just a few cents a day

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 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.

The Advanced Filter Technology - 5 Stages of Filtration


Omnipure Sediment Pre Filter Block WL5605 (Stage 1)

Removes particulate matter such as sediment, rust, dirt, cloudiness from the water. Made in USA. Filter needs replacing every 6-12 months.

Omnipure Q-Series-Q5640 GAC-Filter

Omnipure GAC Carbon Filter WL5640 (Stage 2&4)

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

Omnipure Q Series RO Membrane filter replacement cartridge 10 Inch WL5572

Reverse Osmosis Membrane WL5572 (Stage 3)

Effectively removes up to 99% of 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.

AlkaHydrate Replacement Filter Cartridge

AlkaHydrate Alkalising & Remineralising Cartridge (Stage 5)

The AlkaHydrate filter raises pH levels, producing antioxidant and oxygenating qualities for healthier water. Crafted in the USA, this high-performance filter ensures enhanced hydration, requiring replacement every 2 years for sustained quality and benefits.


How does the Reverse Osmosis Membrane Work?

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. 




Restore Nutrients to Purified Water with Remineralisation

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 Remineralizer Cartridge infuses your water with essential minerals and salts to restore balance and alkalinity. Enjoy water that’s free of toxins yet rich in vital nutrients with our reverse osmosis and remineralization system. Your health deserves the very best water.



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 23124. 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.


Hassle-Free Installation

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! 


Under Sink Reverse Osmosis System with Alkalisation 5 Stage

Everything in its Place: Hose Colour Guide

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. 

Additional information

Weight2 kg
Dimensions25 × 25 × 42 cm


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