• Under Sink Reverse Osmosis System with Alkalisation 5 Stage

Ultra High Purity Under Sink Reverse Osmosis System with Alkaliser – 5 Stage

Tired of drinking tap water that smells like chlorine or worries you with every glass?
Whether it’s fluoride, PFAS, heavy metals, or microplastics, most tap water contains more than you bargained for. And bottled water isn’t a long-term solution. Left unchecked, these contaminants can contribute to hormone disruption, gut imbalance, low energy, and long-term risks. Boiling doesn’t remove them. And filter jugs barely scratch the surface.

Enjoy safe, delicious, and ultra-pure water straight from your kitchen tap!

Why Choose this RO System?

If you’re looking for the ultimate in water purity, this under sink reverse osmosis system is a standout. Designed for Australian homes, it removes virtually all contaminants — including fluoride, chlorine, heavy metals, PFAS, and microplastics — while preserving the taste and essential minerals your body needs.

  • Advanced 0.0005 Micron Filtration – Filters out the smallest contaminants, including viruses and nano-particles.
  • Remineralisation Stage – Adds back healthy minerals like calcium and magnesium for better taste and balance.
  • Long-Lasting Filters – Designed to last up to 12 months with regular use – more convenient and cost-effective.
  • Compact, Neat Installation – Fits under your sink and includes everything needed for quick, tidy setup.

What Does it Remove?

This system effectively reduces or eliminates:

  • Fluoride
  • Chlorine & Chloramine
  • Lead, arsenic & Heavy Metals
  • Nitrates & PFAS
  • Pesticides & Herbicides
  • Bacteria, Viruses, and Microplastics

Thoughtfully Designed, Quality Assured

  • Components Made in USA and UK, Handbuilt in Australia and Wet-Tested before sale
  • BPA-Free & Non-Toxic Materials
  • No Electricity Needed – Efficient, pressure-based filtration system
  • Tap and Tank included
  • 5-year Warranty, NSF certified, and Watermark approved
  • Easy Maintenance with hygienic twist-off cartridges

Important: This system is not suitable for tank or bore water. It is designed for town water only. If you’re unsure which system is right for your water source, feel free to get in touch or explore our Rain Water Tank Filter options. We’re always happy to help you find the best fit.

 

Replacement filter details can be found here.

Replacement tank details can be found here.

View available Faucets.

Choose the tap for your under sink water filter

Retro with High Loop 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 Side Lever High Loop Mixer Tap +$389.00 Side Lever Long Reach Mixer Tap +$319.00 Stainless Steel Premium Mixer Tap +$309.00 Iconic 3-Way Mixer Tap +$309.00 New Nova 3-Way Mixer Tap Polished Chrome +$329.00 ArcFlow Stainless Steel 3 Way High Loop Mixer Tap +$328.00 Stainless Steel Premier Long Reach Matte Black 3-Way Mixer Tap +$449.00 Stainless Steel High Loop Matte Black 3-Way Mixer Tap +$449.00
Reverse Osmosis Tank 5 Litre Reverse Osmosis Tank 8 Litre +$77.00 Reverse Osmosis Tank 11 Litre +$88.00

$790.00$850.00 inc. GST

Description

Specifications
  • 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: 0.0005 micron
  • 5 Year Warranty
Filter Cartridges
  • Sediment Pre-Filter (Made in USA) – Mechanical filtration removes fine sediment particles.
  • Carbon Pre-Filter (Made in USA) – Removes PFAS, chlorine, pesticides, heavy metals and other organic pollutants.
  • Ultrafine TFC RO Membrane (Made in USA) – Screens to 0.0005 micron, filtering PFAS, 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 – Omnipure Remineraliser (made in USA) or AlkaHydrate Alkalising and Remineralising filter (made in Asia) – adds ionic minerals such as Calcium, Magnesium, Potassium and more.  Raises pH and lowers Oxidation Reduction Potential.
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! 

Hose Colours
  • Hose colours:
    – 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

Certified Under Sink Water Filtration

This system meets the WaterMark specification AS/NZS 3497 Drinking water treatment unit – Plumbing requirements.
Certificate Number 52014.

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

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

200mm W x 210mm H

Chrome Mode Faucet with High Loop

Mode

Standard Mode faucet in a high loop design.

150mm W x 290mm H

Chrome Retro Faucet with High Loop and Long Reach

Retro

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

Metro

Standard Metro faucet in a high loop design.

160mm W x 250mm H

Chrome Antique Faucet with High Loop

Antique

Standard Antique faucet in a high loop design.

125mm W x 235mm H

Chrome Fin Faucet with Long Reach

Fin

Standard Fin faucet in a long reach design.

135mm W x 250mm H

Side Lever High Loop Mixer IT003855

Side Lever High Loop 3-Way Mixer

Standard Side Lever in a high loop design. For hot, cold and filtered Water. 

203mm W x 365mm H

Side Lever Mixer IT001169

Side Lever Long Reach 3-Way Mixer

Standard Side Lever in a long reach design. For hot, cold and filtered Water. 

195mm W x 325mm H

Replacement Filter Cartridges for
5 Stage Under Sink Reverse Osmosis System

1st Stage Omnipure Sediment Pre Filter Block WL5605

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

2nd & 4th Stage Omnipure GAC Carbon Filter WL5640

Effectively reduces PFAS, Chlorine, Chemicals, Taste & Odour. We recommend replacing every 6-12 months or 7,500L depending on water quality. Made in USA.

3rd Stage Omnipure Reverse Osmosis Replacement Membrane WL5572

Effectively removes up to 99% of PFAS, fluoride, viruses, bacteria and parasites. The membrane screens to 0.0005 micron for pristine drinking water. Replace every 3-6 years. Made in USA. 

5th Stage AlkaHydrate Alkalising & Remineralising Cartridge

The Omnipure Alkaliser  raises pH levels, producing slightly alkaline oxygenating qualities for healthier water. Replace every 2 years. Made in USA.   quality and benefits.

Reverse-Osmosis-Filter-Membrane

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. Reverse Osmosis systems are consistently one of the better PFAS water filters and water filters that filters fluoride as well.

Certification

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. 

Watermark-NSF

Reverse Osmosis Storage Tank Dimensions

Reverse Osmosis Tank Dimensions

Additional information

Weight2 kg
Dimensions25 × 25 × 42 cm
Alkaliser

Alkahydrate (made in Asia), Omnipure (made in USA)