Ultra High Purity Under Sink Reverse Osmosis System – 4 Stage
Ultra-Pure Filtration. Nothing Added – Just Clean Water.
You want to feel confident about the water your family drinks, but fluoride, PFAS, heavy metals, and microplastics in tap water make that tough. And you shouldn’t need to be an expert to know what’s in it.
This 4-stage ultra purity undersink reverse osmosis system is the gold standard in water purification, removing virtually all contaminants in a powerful unit built for Australian homes. Since RO filters water slowly, we’ve added a tank so you always have ultra-pure water on hand.
Meet Our Reverse Osmosis System
If you’re looking for exceptional filtration without the added remineralisation, this under-sink RO system delivers. Powerful and efficient, it fits neatly under your kitchen sink and produces crystal-clear water straight from the tap — no electricity needed.
What makes it different?
- 0.0005 Micron RO Membrane – filters out even the tiniest particles including fluoride, PFAS, bacteria, viruses, heavy metals, and microplastics.
- NSF-Certified Components – Featuring the WL5640 carbon filter, part of the NSF/ANSI Standard 42 certified Omnipure 5640 Series.
- Handbuilt in Australia – Wet-tested and assembled locally for performance you can trust.
- Built to Last – comes with a 5-year housing warranty.
- WaterMark Certified – Meets AS/NZS 3497:1998 standards.
- Everything Included – Tap, tank, tubing, and fittings — ready for DIY install or your local plumber.
- If you’re looking for an outstanding and reliable PFAS water filter and fluoride filter it’s hard to beat this RO system.
- No electricity required – efficient and reliable without adding to your power bill.
What Are You Avoiding?
- No more second-guessing what’s flowing from your tap
- No more bottled water and clutter on your countertop
- No more research fatigue trying to figure out what works
What You’ll Gain
- Every glass becomes a quiet reassurance
- Feeling confident about what comes out of your tap
- Control of what goes into your body
- Peace of mind
$699.00 inc. GST
Description
Quick Answers
What’s the difference between the 5-stage and 4-stage RO system?
The 5-stage system includes a final remineralisation cartridge that adds back calcium and magnesium for improved taste and mineral balance. The 4-stage system skips this step, focusing purely on removal without adding minerals back in.
Can I use this RO system for tank and bore water?
This system is best suited for town (mains) water. For tank or bore water, please explore our Rain Water Tank Filter options that provide additional sediment and bacteria removal commonly found in untreated sources.
How often do I need to change the cartridges and how much do they cost?
Sediment Pre-Filter: Every 12 months ($89)
Carbon Filters (2x): every 12 months (2x $69)
Membrane: Every 3–6 years – depending on water quality and usage ($149)
Specifications
- Maximum flow rate of 3 litres per minute.
- Max filter output of approximately 200 litres per day (@60psi 25ºC).
- Micron Rating: 0.0005 micron
- RO Filter system dimensions 320W x 420H x 110D mm.
- 5 litre tank Dimensions 317W x 203D mm (upgrades available).
- 5 year warranty.
Filter Cartridges
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.
If you whish to add a remineralising cartridge, please see our Reverse Osmosis System with Alkaliser.
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.
We want to ensure your installation experience is easy and stress-free. Please reach out to our support team with any questions!
Storage Tanks
Certified Countertop Water Filtration
This system meets the WaterMark specification AS/NZS 3497 Drinking water treatment unit – Plumbing requirements.
Certificate Number 52014.
- Fluoride
- Aluminium
- Barium
- Cadmium
- Chloramine
- Chlorine
- Chromium
- Copper
- Cryptosporidium & Giardia
- Cysts
- e. Coli Bacteria
- PFAS
- Heavy Metals
- Hydrocarbons
- Iron
- Lead
- Manganese
- Mercury
- Microplastic
- Nitrate
- PCB’S
- Pesticides & Herbicides
- Potassium
- Radium
- Sediment, Dirt & Rust
- Selenium
- Sodium
- Fluoride
- Aluminium
- Barium
- Cadmium
- Chloramine
- Chlorine
- Chromium
- Copper
- Cryptosporidium & Giardia
- Cysts
- e. Coli Bacteria
- Heavy Metals
- Hydrocarbons
- Iron
- Lead
- Manganese
- Mercury
- Microplastic
- Nitrate
- PCB’S
- PFAS
- Pesticides & Herbicides
- Potassium
- Radium
- Sediment, Dirt & Rust
- Selenium
- Sodium
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.
Spring Loaded
Standard Spring Loaded faucet with black lever, in a long reach design.
200mm W x 210mm H
Mode
Standard Mode faucet in a high loop design.
150mm W x 290mm H
Retro
Standard Retro faucet in a high loop design and long reach.
125mm W x 235mm H
Euro with Long Reach
Standard Euro faucet in a long reach design.
150mm W x 230mm H
Euro with High Loop
Standard Euro faucet in a high loop design.
150mm W x 230mm H
Metro
Standard Metro faucet in a high loop design.
160mm W x 250mm H
Antique
Standard Antique faucet in a high loop design.
125mm W x 235mm H
Fin
Standard Fin faucet in a long reach design.
135mm W x 250mm H
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 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
4 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.
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.
Reverse Osmosis Storage Tank Dimensions
Additional information
| Weight | 2 kg |
|---|---|
| Dimensions | 25 × 25 × 42 cm |
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