• Under Sink Reverse Osmosis System with Alkalisation 5 Stage

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

Ultra-Pure Filtration for Everyday Peace of Mind

Still wondering what’s really in your tap water?

Whether it’s fluoride, PFAS, heavy metals, or microplastics — contaminants often found in everyday drinking water can quietly affect your body, your energy, and your peace of mind.

That’s why we’ve designed a Reverse Osmosis system that goes above and beyond. Made for Australian homes, this powerful under-sink system removes virtually all unwanted elements while adding back essential minerals for better taste and balance.

Because water should lift you up — not weigh you down.

 

Meet Our Reverse Osmosis System

If you’re looking for the highest level of filtration, this undersink water filter system is the gold standard. This compact, easy-to-install reverse osmosis system fits neatly under your sink and delivers ultra-clean water straight from your tap — no electricity needed.

Here’s what makes it different:

  • 0.0005 Micron RO Membrane – Filters out the smallest particles, including fluoride, PFAS, bacteria, viruses, and even nano-plastics.
  • Remineralisation Stage – Adds back calcium and magnesium for taste and balance.
  • NSF-Certified Components – Includes the WL5640 carbon filter, part of the certified Omnipure 5640 Series under NSF/ANSI Standard 42.
  • Handbuilt in Australia – Assembled and wet-tested locally for quality you can trust.
  • Easy & Clean Install – Comes with tap, tank, and all parts included — no clutter, no hassle.

What Does it Remove?

  • Fluoride
  • Chlorine & Chloramine
  • PFAS
  • Lead, arsenic & other heavy metals
  • Nitrates
  • Pesticides & herbicides
  • Microplastics, bacteria, and viruses

Here’s how it works:

  1.  Choose your setup (tap, tank, add-ons)
  2.  Install yourself or with a local plumber – all parts included
  3.  Enjoy ultra-pure, great-tasting water on demand.

What Happens If You Don’t filter?

You keep second-guessing what’s in your water — and what it’s doing to your body. Contaminants don’t just pass through. They build up, disrupting hormones, energy, and gut balance.

What Happens If You Do?

Every glass becomes a quiet reassurance. You’ll feel good knowing your water is as clean as it can be — supporting your clarity, energy, and wellbeing one sip at a time.

Built to Last. Backed by Trust.

  • Made with non-toxic, BPA-free materials
  • Tap and tank included
  • 5-Year Housing Warranty
  • WaterMark Certified (AS/NZS 3497:1998)
  • NSF Certified Components
  • No electricity required

*The Omnipure WL5640 carbon filter is part of the 5640 Series, which is certified to NSF/ANSI Standard 42

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.

Choose the tap for your under sink water filter

Retro with High Loop Spring Loaded Black Lever Chrome +$10.00 Metro with High Loop Chrome +$20.00 Antique with High Loop +$20.00 Fin with Long Reach +$30.00 Mode with high Loop +$50.00 Euro with High Loop +$90.00 Euro with Long Reach +$90.00 Side Lever High Loop 3 Way Mixer Chrome +$409.00 Side Lever Long Reach 3 Way Mixer Chrome +$349.00 Stainless Steel Premium Mixer Tap +$309.00 3-Way Mixer Tap Standard Chrome +$319.00 New Nova 3-Way Mixer Tap Polished Chrome +$309.00 Stainless Steel High Loop 3-Way Mixer Tap +$299.00 Premier Stainless Steel Matte Black 3-Way Mixer Tap (Long Reach) +$299.00 Stainless Steel 3 Way High Loop Matte Black 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

Sediment Pre-Filter (Made in USA)
Change every 6-12 months
Mechanical filtration removes fine sediment particles.

Carbon Pre-Filter (Made in USA)
Change every 6-12 months
Removes PFAS, chlorine, pesticides, heavy metals, and other organic pollutants.

Ultrafine TFC RO Membrane (Made in USA)
Change every 3-6 years
Filters to 0.0005 microns, removing PFAS, viruses, bacteria, parasites, fluoride, and hydrocarbons.

Coconut Carbon Post-Filter (Made in USA)
Change every 6-12 months
Final polishing filter delivering pure, clean water.

Alkalising Filter
Change every 2 years
Omnipure Remineraliser (USA) or AlkaHydrate (Asia) — adds essential minerals (Calcium, Magnesium, Potassium) and raises pH, improving water quality.

 

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. 

We want to ensure your installation experience is easy and stress-free. Please reach out to our support team with any questions! 

RO Under Sink Installation Diagram
RO Under Sink Tee Piece & Drain Clamp

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

Choose Your Under Sink Water Filter Tap

All our under sink water filter taps 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 comes with a black lever and long reach design.

200mm W x 210mm H

Chrome Mode Faucet with High Loop

Mode

Standard Mode faucet comes in a bright chrome finish and features a high loop design.

150mm W x 290mm H

Chrome Retro Faucet with High Loop and Long Reach

Retro

Standard Retro faucet comes in a bright chrome finish and features a high loop design.

125mm W x 235mm H

Chrome Euro Faucet with Long Reach

Euro with Long Reach

Standard Euro faucet comes in a bright chrome finish and a long reach design.

150mm W x 230mm H

Chrome Euro Faucet with High Loop

Euro with High Loop

Standard Euro faucet comes in a bright chrome finish and features a high loop design. 

150mm W x 230mm H

Chrome Metro Faucet with High Loop

Metro

Standard Metro faucet comes in a bright chrome finish and features a in a high loop design.

160mm W x 250mm H

Chrome Antique Faucet with High Loop

Antique

Standard Antique faucet comes in a bright chrome finish and features a high loop design.

180mm W x 280mm H

Chrome Fin Faucet with Long Reach

Fin

Standard Fin faucet comes in a bright chrome finish and features a high-arc, minimalist design. 

135mm W x 250mm H

Side Lever High Loop Mixer IT003855

Side Lever High Loop 3-Way Mixer Chrome

The Side Lever High Loop 3-Way Mixer Tap in Chrome features a sleek high-loop design, providing hot, cold, and filtered water from a single tap.

203mm W x 365mm H

Side Lever Mixer IT001169

Side Lever Long Reach 3-Way Mixer Chrome

The Side Lever Long Reach Mixer Tap features a simple yet elegant design, providing hot, cold, and filtered water from a single tap.

195mm W x 325mm H

3 Way Mixer Tap STD Chrome

3-Way Mixer Tap Standard Chrome

The 3-Way Mixer Tap Standard Chrome comes in a  sleek long-reach design, providing hot, cold, and filtered water from a single tap.

245mm W x 180mm H

Nova Mixer

New Nova 3-Way Mixer Tap Polished Chrome

The New Nova 3-Way Mixer Tap Polished Chrome features a sleek long-reach design, providing hot, cold and filtered water from a single tap.

200mm W x 210mm H

Stainless Steel 3 Way High Loop Mixer

Stainless Steel High Loop 3-Way Mixer Tap

The Stainless Steel High Loop 3-Way Mixer Tap features an modern design in a brushed chrome finish, providing hot, cold and filtered water from a single tap.

225mm W x 400mm H

Stainless Steel Premier Matte Black Mixer

Premier Stainless Steel Matte Black 3-Way Mixer Tap

The Stainless Steel Premier 3-Way Mixer Tap features a matte black finish and long reach, providing hot, cold, and filtered water from a single tap.

210mm W x 290mm H

Stainless Steel Premier Mixer

Premier Stainless Steel Tall 3-Way Mixer Long Reach

The Premier Stainless Steel Tall 3-Way Mixer Tap features a sleek, modern long-reach design and delivers hot, cold, and filtered water from a single tap.

240mm W x 360mm H

Stainless Steel 3 Way High Loop Matte Black Mixer

Stainless Steel 3 Way High Loop Matte Black Mixer Tap

The Stainless Steel 3 Way High Loop Matte Black Mixer Tap features a high loop design in a matte black finish, providing hot, cold, and filtered water from a single tap.

225mm W x 400mm 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

Additional information

Weight2 kg
Dimensions25 × 25 × 42 cm
Alkaliser

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