The 6 Best Reverse Osmosis Filters for Australians in 2023 (2023)

Finding the best reverse osmosis water filter is an easy ticket to a better life.. With the right purchase, an RO filtration system can give you decades of instant access to healthy, great tasting water, all built into your very own kitchen sink.

Unfortunately, consumers in Australia can be overwhelmed with so many options.They have when it comes to improving drinking water, and spending hundreds of dollars on the wrong system can be devastating to your home improvement budget.

Fortunately, Enviro Friendly is here to help. Below, we take a look at the best reverse osmosis water filters and show you exactly how to find the ideal product to add moisture and freshness to your home.

Alright, let's continue.

Without taking up your valuable time, we've done our research and found the Clear Choice Water 5 Stage USA reverse osmosis filter to be the top choice for Australians looking for a reverse osmosis solution under the sink point of use.

1.Clear Choice Water 5 Stage USA Reverse Osmosis

What you love about Clear Choice 5-Stage RO:

  • 5 stage filtration
  • An affordable choice for advanced technology
  • Insurance, additional benefits and good taste
  • Lifetime warranty included

Despite being named after a different country, the Clear Choice Water USA 5-Stage Reverse Osmosis Filter is the top choice for bassShipping available all over Australia. Complete with a full money-back guarantee, the Clear Choice Water 5-Stage RO System is a highly functional machine built with simplicity and little room for error.

An affordable solution without sacrificing quality, the 5-stage system reduces sediment, purifies the water, adds minerals, balances the pH, and even uses a coconut charcoal filter to keep the water tasting.

Housed in a compact hard shell casing, the Clear Choice 5 Stage USA is built to last, is membrane certified and comes with a limited lifetime warranty. Coupled with the company's reputation for excellent customer support, the Clear Choice Water 5 Stage USA is a high-performance, low-waste reverse osmosis system that has everything you need for healthy, great-tasting water.

Other Great Reverse Osmosis Water Filters

And while we think the aforementioned RO filter is the 'right choice' for the top spot, there are plenty of other great devices on the Australian device market. Below, we'll take a look at another handful of quality products to consider for better water.

2.iSpring RCC7AK 6 stage under bench reverse osmosis system

Why iSpring is a great runner-up:

  • A longtime favorite with rave reviews
  • 6 filter levels
  • Multiple output lines for additional use
  • Live customer support

With over 6,000 five-star reviews on Amazon, the 6-stage RO RCC7AK system is a highly functional drinking water treatment device from the international manufacturer iSpring. At a very affordable price, this 6-stage membrane filters down to 0.0001 microns, bringing healthy, great tasting water to your sink, ice maker or other outlet.

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While the quality and price of this system could easily make the iSpring RCC7AK the number one reverse osmosis water filter on the market, some international design flaws have prevented some Australians from easily installing the system.

And while homeowners can get creative with some things around the house, we highly recommend having a professional take a look at your iSpring before installing it under the sink. Fortunately, the company offers live international customer support, includes installation instructions with every shipment, and maintains an online library of helpful resources.

3.Express Water RO5DX 5 stage reverse osmosis system

Why should you choose the Express Water RO5DX 5-Stage RO?

  • Great value for money
  • A popular product with good testimonials
  • Effective against 99.99% of pollutants
  • 1 year warranty and lifetime support

Next, we would like to bring your attention to Express Water's RO5DX 5-Stage Reverse Osmosis System, another highly rated American-made drinking water solution. Effective against up to 99.99% of contaminants, the Express Water RO5DX's five-stage system successfully stops all traces of arsenic, total dissolved solids (TDS), radium and other common pollutants.

Protected by a one-year warranty and lifetime support, the Express Water RO5DX has over 400 five-star reviews on and ships worldwide. With over 7,000 units sold and free returns, Australians can try this device risk-free with a 30-day full refund.

Best of all, Express Water has a 99.7% positive rating on eBay and even includes seven additional filters to make the most of your purchase. Ready for years of easy use with instructions, support and easy maintenance, smart shoppers will love the Express Water R05DX+7.

4.Large water filters - Elite Series 3

What you should know about the Great Water Filters Elite Series 3:

  • Free installation across Australia
  • 100% first year guarantee
  • 10 years of savings and support available
  • Easy to use screw-on filter cartridges

With the word "great" in its name, the Elite Series 3 by Great Water Filters is an excellent choice for easy access to long-term healthy drinking water. Complete with Australia-wide delivery and installation, Great Water Filters will personally put this quality product under your sink, backed by a 1-year 100% money back guarantee.

After day of installation, users can maintain their RO system for its entire life with extremely simple screw-on filters. Should something happen, Great Water Filters also offer VIP support packages for added protection of their world famous productions.

With a free consultation and a stylish faucet, the Great Water Filters Elite Series 3 is one of the easiest ways to get healthy, refreshing water without having to go to great lengths to compare your own options. The Elite Series 3 is fueled with mineral fuel, pH balanced and 100% safe from potential sanitation. She is a solid luxury option.

5.Aquasana OptimH2O reverse osmosis water filter system

Why Aquasana is great:

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  • ultra fast system
  • Claryum's unique selective filtration
  • Potassium ion exchange and remineralization
  • 90 days warranty, 2 years filter warranty

Equipped with Australian parts and shipped nationwide, the Aquasana Optima H20 Reverse Osmosis Water Filter is a unique device for improving Down Under drinking water. Combining Claryum selective filtration with traditional reverse osmosis technology, this 3-stage system is designed to remove more impurities than the average water filter.

Most importantly, the Aquasana OptimH20 reverse osmosis water filtration system is ideal for anyone who is tired of waiting for their old faucet to work. As an ultra-fast system, the Aquasana Optim H20 provides endless fast, healthy water with a 2-year warranty and 90-day money-back guarantee.

If you are considering the Aquasana OptimH20 RO, please note that in some parts of Melbourne with extreme levels of sediment, this 3-stage filter may not provide sufficient purification to consider heavily polluted water as the best option.

6.Clear Choice Water - Countertop reverse osmosis system

Why should you choose the countertop system?

  • Ideal for homes without space under the sink
  • Easy installation with no installation required
  • Membrane has a shelf life of six years

Do you remember our friends at Clear Choice Water? Well, if you don't have enough space under the sink for appliances, we recommend opting for a Clear Choice Water reverse osmosis system to efficiently and effectively filter your water.

The Clear Choice Water Countertop RO System was developed in Australia to combat localized contamination and fits into domestic systems. It's an affordable four-step option for purifying tasty water. And although it's made to sit on a countertop, the device doesn't take up much space and simply plugs directly into your faucet.

While typically a little slower than under-sink installations, countertop RO systems like this product from Clear Choice Water are just as filter-capable and long-lasting. With a long membrane life rating of 100 gallons per day, the Clear Choice Water Countertop reverse osmosis system is a very easy way to start drinking better water right away and for years to come.

How to choose the best reverse osmosis water filter

If you need help choosing the best reverse osmosis water filter for your kitchen, here are some things to consider when discussing various quality options.

purpose of use

Before choosing the best RO system for your home, you need to know exactly where to install it. While everyone would love to have their reverse osmosis water filter put away, in some life situations there just isn't enough room for one.Water filter under the sink, and installation costs apply when a contract plumber is guaranteed.

If you're looking for something incredibly simple, there's no shame in buying a desktop RO system. However, for the best upgrade and overall lifestyle experience, we can firmly state that an under sink RO filter is always your best bet for consistently purchasing a powerful, minimally invasive system.

It is also important to remember that the typical RO filter should only be used in a sink as a "point-of-use" system, not as aWhole house water filter.

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Filtering process and steps

When it comes to filtration, more steps in the process are almost always better for you and your home. And while there are some models with "10-stage" filtering processes, this could just be a bit of clever marketing, and four-, five-, and six-stage systems are normally a sign of quality materials.

If you are looking for a reverse osmosis water filter to protect your water from a specific containment, we recommend that you review all the details on a product to ensure it is up to the task. With regard to the health and quality of your drinking water, if in doubt, you will not regret any further purification.

In a scenario where your budget prevents you from purchasing a luxury system, you can also choose a less expensive specialized RO filter specifically designed to reduce acidity, block sediment or purify taste, whichever is most important to your home.


NSF filter certification is considered the gold standard for quality drinking water around the world. NSF International (which originally stood for National Sanitation Foundation) is based in the United States and has been certifying water quality since 1944. All products marked with this label are always reliable.

InsideNSF filter certification system, there are many different standards related to the quality of filtration membranes and the safe use of the entire system as a whole. When looking for the best reverse osmosis water filter, look for Standard 58 (NSF/ANSI 58-2009), which is specifically used to certify point-of-use RO systems.


In addition to the price of an installation, the buyer of a reverse osmosis water filter must be willing to pay for some form of delivery or installation. Reverse osmosis drinking water systems are large, often heavy, and typically require a professional to install the parts safely and efficiently.

While many companies offer "free installation" or "free shipping," these products are typically (conveniently) a few hundred dollars more expensive than similar products from retailers with itemized costs. In any case, consumers should do their best to calculate all possible costs associated with an RO water filter installation before purchasing any specific system.

running costs

Over time, the sediments and filters wear out to the point where they need to be replaced. For this reason, most consumer-facing companies manufacture reverse osmosis drinking water systems with easily replaceable filters that don't require a qualified plumber to install.

In most scenarios, consumers can simply purchase a new round of filters from the original manufacturer when it's time to upgrade the system. To ensure that buying more parts doesn't bankrupt you, it's always a good idea to research projected filter lifecycles and new unit prices before committing to a specific brand.

Also, to ensure replacement parts are readily available, we recommend working with a reputable, long-established company that will likely be in business for the next decade. Without easily replaceable filters, you might have to replace your entire system, which is a future expense that everyone would certainly want to avoid.


Last but not least, always check the warranty on a reverse osmosis water filter before investing in a new system. Because they're built to last for years, quality RO parts are usually warranted for at least 12 months and anything less than that should be considered a slightly riskier choice without the proper experience.

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Warranties on RO filters vary between different parts of a system, with separate insurance periods for tanks, filters, fittings, etc. .

Most importantly, all of the RO filters we've included on this list are sold with some sort of money-back guarantee. We know things happen and occasionally systems just don't fit in your home or don't work efficiently, which is why finding a refundable option is always a safe bet. For the best all-in-one insurance, look for the RO in your price range with the longest money-back guarantee period.

General Backup Osmosis Water Filter Q&A

Finally, let's wrap things up with a series of frequently asked questions to help answer the ongoing confusion about reverse osmosis water filters.

What is Reverse Osmosis?

Reverse osmosis (sometimes simply called RO) is a process for purifying drinking water. Although it sounds overly scientific, reverse osmosis is simple. Most RO filters simply use a partially permeable membrane that separates the "good" ions from the "bad" ions to leave you with the best drinking water possible.

How does reverse osmosis work?

Reverse osmosis water filters are typically powered by a high pressure pump that forces water through the partially permeable membrane. As a one-way process, RO systems are typically very effective at trapping up to 99% of unwanted matter before it reaches your faucet.

How many steps does the reverse osmosis process have?

While you can never be sure what comes next, most modern reverse osmosis water filters have three, four, and five stages of filtration. With this in mind, four stage RO filters are among the most commonly used for homes in Australia and around the world, with many systems incorporating additional filters to block new contaminants and produce better tasting water.

What does a reverse osmosis chart look like?

Reverse osmosis charts are usually included in all home systems. Although the process is also used commercially and industrially, there are many resources online to see how RO works and we recommend this.Crystal Water Perth guide and chart.

What is a reverse osmosis membrane?

A reverse osmosis membrane is a semipermeable filter used to block most dissolved salts, bacteria, organic matter and pyrogens. Usually made from cellulose acetate or polysulfone, they are most commonly used to remove chlorine, sediment, and other common contaminants from water.

How often does a reverse osmosis membrane need to be changed?

There are many variables that affect how often a reverse osmosis membrane needs to be replaced, including system size and consistency of use. For commonly used domestic potable water systems, it is recommended that most reverse osmosis membranes be replaced every 12 months.

How do I know if my reverse osmosis filter is faulty?

RO filters clog up with contaminants and debris and often show signs of aging by decreasing or completely stopping water flow. In rare cases, long-standing clogs can also result in leaks, strange noises, or unpleasant tastes or odors that require emergency replacement.

Can I use a reverse osmosis filter with my rainwater tank?

if you have onerain water tankon your property, good for you. Harvesting rainwater is a smart way to use one of our most precious resources. Unfortunately, filtering rainwater with a reverse osmosis filter isn't the smartest idea. Because of the process used by RO, much of the water is wasted in filtration.

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And there you have it: Australia's best reverse osmosis water filters. We hope this guide has helped you learn more about the technology and pointed you in the right direction to find the best product for your lifestyle. Check out all of our guides for more great eco-conscious DIY ideas.


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