Under Sink Water Filter

The purpose of any water filter is to improve water quality by removing unwanted impurities. Our Elite Series 2 is a specialist alkaline water filter system that not only purifies tap water but also returns essential minerals to the water, like calcium and magnesium, after the filtration process.
The result? Great-tasting, odour-free, healthy drinking water that enhances your hydration.

Cartridge Replacements – $1,195 / Every Year

3 Steps to Pure Water

Choose your Package

Sit back and relax with our easy turnkey solution. Flexible payment options make it simple.

Frozen Price Guarantee

Enjoy peace of mind with our no-fit-no-fee guarantee. Frozen price includes full installation.

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Pay Only Once Installed

No upfront costs, no hidden surprises. You pay only once your system is fully fitted and working.

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Free No-Charge
Installation on New Systems*

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Cartridge Replacement Support & Care

Cartridge Replacement Support & CareCourtesy reminder calls to schedule a service, post out or arrange installation of replacement water filter cartridges.

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Technology Updates

Technology UpdatesAccess the very latest, cutting-edge, breakthrough water filtration technology.

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Free Postage

Enjoy the convenience of having your up to date water cartridges replacement delivered straight to your door – completely for free.

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Free 5 Yr Guarantee Extension

Extra Product Guarantee Extension from market normally 1 Year to 5 YEARS (Service call outs 2 years)

Elite Series 3

Reverse Osmosis Wellness Water Filter

The ES3 Reverse Osmosis water filter delivers the highest standard of under sink water purification, using the same world-renowned RO technology trusted in bottled water production.
Designed for Australian homes, it combines advanced filtration with long-term wellness benefits, giving your family cleaner, safer, and better-tasting water every day.

Here’s why families across Australia choose the ES3:

✅ Fluoride Removal with RO Technology – Advanced reverse osmosis membrane proven to reduce fluoride for safer, healthier drinking water
✅ Perfectly Balanced pH7+ Water – Restores natural alkalinity to improve hydration, taste, and overall wellness
✅ Essential Mineral Return – Reintroduces vital minerals such as calcium, magnesium, sodium, and potassium for flavour and vitality
✅ Quick Change Cartridges – Simple, tool-free replacements make ongoing RO system maintenance fast and hassle-free
✅ High Performance Reverse Osmosis Filtration – Removes up to 99% of contaminants including chlorine, pesticides, heavy metals, bacteria, and other impurities
✅ Comprehensive Water Protection – Semi-permeable RO membrane blocks microscopic pollutants to deliver consistent purity
✅ Compact Under Sink Water Filter System – Space-saving design, installed neatly under your kitchen sink with professional fitting included
✅ Purified Water for Drinking & Cooking – Fresh, clean water for every glass, meal, tea, or coffee, free from chemicals, odours, and harmful substances
✅ TDS Reduction for Safer Water – Lowers Total Dissolved Solids, ensuring consistently high quality, healthier water

NORMALLY $1,700 NOW $1,195

or 4 payment $300

12 Months Interest-Free of $105 with ZIP/HUMM

Technology Light Years Ahead

Our Reverse Osmosis membrane provides ultra-fine filtration down to 0.0001 micron, the same proven technology trusted in bottled water production, under your sink!

PH7+ Balanced Water

Produces perfectly pH-balanced alkaline water, helps minimise the fluctuations of your body's pH.
Puts Healthy Minerals Back In

Essential minerals such as Calcium, Magnesium and Potassium which were lost while purifying the water are returned.
Like Changing a Light Bulb!

No tools required. Cartridge replacements are quick and safe, designed to be as easy as changing a light bulb - sanitary and safe!

Call 1300 137 011

Book & Install Today

A Better Design & Quality

Featuring Reverse Osmosis – the same technology used for bottled water

Stylish Stainless Steel Tap

Includes a stylish European style tap, made lead-free stainless steel to provide safe, pure drinking water to you and your whole family daily.
Intuitive Smart Gauge

Built-In smart gauge provides real-time feedback on filter status, helping protect the RO membrane and ensuring reliable, long-term operation.
Flush Valves

Simple, clean & easy maintenance to flush cartridges regularly and efficiently. Designed to protect the reverse osmosis membrane.

Call 1300 137 011

Book & Install Today

What This Filter Removes

The Elite Series 2 uses advanced filtration technology to remove dissolved solids and heavy metals down to just 0.2 microns. This high-performance ionized water filter process ensures your household has access to pure, mineral-rich drinking water, making it one of the most efficient alkaline water filter systems for home use.

Stage 1 — 5 Micron Sediment FilterEffective in removing dirt, rust and sand particles.

Stage 2 — 1 Micron Activated Carbon FilterThis granular activated carbon filter is composed of high-performance activated carbon that remove free chlorine, odour, organic contaminants, pesticides and chemicals that contributed to taste and odour.

Stage 3 — 0.0001 Micron Reverse Osmosis Membrane

Stage 3 — 0.2 Micron KDF + Coconut Shell Carbon FilterRemoves heavy metals & bacteria

Stage 4 — +Alkaline / MineralsThe Alkaline filter changes your water into a perfect natural alkaline ionized water.
The Alkaline filter simply returns minerals such as ionized calcium, magnesium, sodium, potassium ions, which were taken away while purifying the water.

Under Sink Water Filter Reviews

“Great service and support. Great Water Filters send me an annual reminder when my filters are due, they keep records so I get the right filters at the right time.
Support is unparalleled. I get help when I need by phone and in the event of something going wrong, Great Water Filters had a representative from WA to help resolve the issue in one visit.
Phone support, ordering additional filters (for showers), and response times are excellent. I recommend them highly!”

Peter H.27 August 2024

“Quality finishes, water and customer service. From meeting Paul at the Home Expo, to engaging with Levon to help plan and work through all our queries and ultimately to Shannon implementing the system we're delighted with the result and enjoying the filtered water at every tap point in our home...and without loss of pressure. Thanks Great Water Team!”

Yianni S.27 August 2024

“Fantastic experience from start to finish. No pushy sales like the other company we enquired with. We kind of knew what we wanted, and any questions we had were answered honestly and concisely. We’re loving having filtered water throughout the whole house with no noticeable water pressure loss. Thanks for being such a wonderful company to deal with. I have already recommended the whole home filtration system to several of our family and friends”

Christie K.27 August 2024

“Very happy with the quality of the product and the service. We have gone from having dirty, hard water (awful town supply!) to clean water that feels soft after the installation of a whole-house filter. The whole process was quick, taking less than a week from my first approach to Great Water to the filter being installed. The plumber assigned was friendly and professional. A very small amount of seepage we had after installation was fixed within a day after one text message to Great Water. While the price may put some off, we see it as a saving on the jug filters we no longer need to buy, and on the damage the old hard water used to do to the bathroom, kitchen and cars. I would definitely recommend Great Water's household filter system.”

Paul27 August 2024

Compare The Market

Comparing The Two Systems

FEATURES

Great Water ES3

Other Reverse Osmosis Systems

Lead-free European Tap

Built-in Pressure Gauge

pH7+ Balanced Water

Simple Quick Change Cartridges

Returns Essential Minerals

Sanitary Safe

COMPARE THE MARKET

Our Whole House Water Filtration Systems are designed to deliver clean, safe, and healthy water to every tap in your home — protecting your family from chlorine, odour, bacteria, viruses, chemicals, and impurities. Your home deserves more than just filtered drinking water. With purified water flowing through every pipe, you’re not only safeguarding your health but also preserving your appliances and enhancing your entire lifestyle.

Here’s why families across Australia trust us:

✅ Beautiful Design & Smart Door Access
✅ Built in SS Bypass
✅ Intuitive Notification Gauges
✅ Quality 316 Marine Grade Stainless Steel
✅ Filtration up to 1 micron

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Specialty Taps for Reverse Osmosis Water Filters

Upgrade your Reverse Osmosis water filter system with a premium specialty tap, designed for both performance and style. Engineered to deliver purified water directly from your RO unit, these taps ensure your family always has access to clean, safe drinking water at the turn of a handle.

speciality Taps

Reverse Osmosis & Alkaline Water Filtration Systems

Our water filter systems remove contaminants, add healthy minerals and balance pH to 7+. Designed for quick cartridge replacement and trusted in homes, offices and workplaces throughout Australia and New Zealand.

Compare Water Filter Systems

Lead-Free Stainless Steel

European-style tap made from lead-free stainless steel for safe, pure drinking water.

Stylish Finishes

Available in brushed nickel, polished chrome, and matte black to complement any kitchen design.

Durable Construction

Resistant to corrosion and tarnishing for long-lasting reliability.

Easy Installation

Compatible with most RO systems, designed for quick and simple integration under your sink.

GUIDES

Specification

Dimensions (Filter Unit) - Filters- 33cm (W) x 8cm (D) x 33cm (H)

Storage Tank - 28cm (Diameter) x 38cm (Height)

Flow Rate - 3 Litres Per Minute

Weight - 3.5kg

Tap Drill Hole Diameter - 12mm

Cartridge Life - Cartridges – 10-12 Months, Membrane – 24 Months

Cartridges are made from high quality, natural materials, and are clinically tested.

What's in the box?

Download Brochure

Installation

Cartridge Change

Troubleshooting

FAQs

What is an under-sink water filter?

An under-sink water filter is a compact purification system installed underneath your kitchen sink and directly connected to your water line. It filters your tap water before it reaches your faucet, giving you a constant supply of clean, fresh, great-tasting water for drinking, cooking, and everyday use. Because it stays hidden beneath the sink, you enjoy powerful filtration without taking up any bench space or altering the look of your kitchen.

How does an under-sink filter work?

Under-sink filters use a multi-stage purification process that treats water as it flows through various cartridges. Each stage targets different contaminants — such as sediment, chlorine, chemicals, and even microscopic particles — ensuring the water you drink is consistently purified. Advanced systems may also include reverse osmosis membranes and alkaline cartridges, helping produce water that is not only cleaner but also smoother, better-tasting, and balanced for daily consumption.

What contaminants does the system remove?

Depending on the model you choose, an under-sink system can remove a wide range of impurities including rust, dust, sand, sediment, chlorine, organic chemicals, heavy metals, bacteria, and other dissolved contaminants. Higher-end systems can filter down to extremely fine levels, removing particles as small as 0.0001 microns. This ensures your household enjoys water that is cleaner, safer, and noticeably more refreshing.

Does an under-sink filter improve taste?

Yes, absolutely. One of the biggest benefits of an under-sink system is the dramatic improvement in taste and smell. By removing chlorine, chemicals, and impurities that affect flavour, the system delivers crisp, clean, and refreshing water right from your tap. Many customers switch entirely from bottled water because the taste difference is so significant.

Do the filters add or balance minerals?

Some advanced systems include alkaline or remineralising cartridges that restore essential minerals like calcium, magnesium, and potassium after filtration. This helps balance the pH of your water, making it smoother, more hydrating, and more enjoyable to drink. These systems provide the perfect balance of purity and mineral content, ensuring your water remains healthy and delicious.

Will this system help reduce plastic bottle usage?

Definitely. With purified, great-tasting water available at home 24/7, most households dramatically reduce or completely eliminate the need for single-use plastic bottles. This helps you save money, reduce waste, and make a more environmentally friendly choice every day.

Can the system be installed in any home?

Yes. Under-sink systems are compatible with most homes, kitchens, and plumbing setups, including apartments and rental properties. As long as there is standard access to your cold-water line and some space under the sink, installation is usually straightforward.

Which under-sink system should I choose?

Your choice depends on your water quality needs and goals:

Multi-stage or alkaline systems are great for improving everyday taste and removing common contaminants. They’re ideal for households that want better-tasting, cleaner water without overcomplicating things.
Reverse osmosis systems with remineralisation offer the highest level of purification for families seeking ultra-clean, mineral-balanced water. These systems remove a wider range of impurities and produce premium-quality drinking water.

What’s the best whole house water filter in Australia? The ES5Q Whole House Water Filter is one of Australia’s most trusted systems, providing mineral-balanced, crystal-clear water to every tap. Its five-stage filtration removes impurities, softens water, and restores beneficial minerals for healthier hydration and cleaner plumbing.

NEWS & ARTICLES

WHAT'S THE BEST PH WATER TO DRINK?

If you’re concerned about the quality of your water and want to ensure you and your loved ones are drinking the best, understanding water pH is crucial.