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Understanding Reverse Osmosis Filters: Benefits, Myths & More

In this guide, we’ll cover everything you need to know about reverse osmosis filters including how they work, who needs RO, the benefits, common myths, and how to choose the right system for your home.


Fresh, clean water splashing into open hand

Understanding Reverse Osmosis Filters

Reverse osmosis filters are one of the most advanced and effective ways to improve the quality of your drinking water at home. Designed to remove a wide range of contaminants, a 5-Stage or 6-Stage reverse osmosis water filter system delivers clean, fresh-tasting water straight from your tap.

What is a reverse osmosis filter and how does it work?

A reverse osmosis (RO) filter is a water purification system that uses an ultrafine membrane to remove impurities at a microscopic level.

Unlike standard filters that primarily target sediment and chlorine, reverse osmosis filters are capable of reducing dissolved solids, heavy metals, and other contaminants that affect your water quality.

A typical reverse osmosis system includes these components:

  • Pre-filters that remove sediment, chlorine, PFAS and PFOS
  • RO semi-permeable membrane that filters out dissolved impurities (inorganic salts and organic matter)
  • Post-filters that improve taste and polish the water

As water passes through each stage, contaminants are progressively removed. The result is highly purified water that is noticeably cleaner in taste, smell, and appearance.

At Clean & Clear Water, we offer 5- and 6-Stage Reverse Osmosis filter systems, built in Australia with genuine components from the USA and UK. These multi-stage processes are what sets our reverse osmosis water filters apart from basic filtration systems, making them the ideal choice for anyone seeking a higher level of water purification.

Who really needs a reverse osmosis system?

Access to safe drinking water is vital to sustain life. In Australia, our tap water is generally considered safe to drink. But the quality, taste and odour of your water can vary depending on where you live and where your water comes from.

Some of the main factors affecting water quality around the country include:

  • Heavy rains, floods, droughts and algal blooms introducing contaminants into water supplies.
  • Ageing pipe networks leaching sediment and adding heavy metals.
  • Urban runoff from cities carries pollution from residents and industries.
  • PFAS and PFOS, also known as “forever chemicals”

What are “forever chemicals”?

“Forever chemicals” is a common term for per- and polyfluoroalkyl substances (PFAS). These manufactured chemicals are known for their resistance to water, heat, stains, and flames – but they also resist breaking down in our environment.

One type of PFAS, known as PFOA, has been classified by the World Health Organisation as a Group 1 human carcinogen. In Australia, the National Health and Medical Research Council (NHMRC) has reviewed guidance on PFAS in our drinking water, as part of an update to the Australian Drinking Water Guidelines. The review significantly lowered the permissible levels for PFOA, as well as PFOS and PFHxS. However, our allowable limits for certain “forever chemicals” are less strict than in the USA, Canada and the EU.

If you’re concerned about your household water quality, installing a reverse osmosis system offers an effective and dependable solution.

Benefits of reverse osmosis water filters for Aussie homes

  • Removes a broad range of contaminants including chlorine, heavy metals like lead and arsenic, salts, microplastics, E. coli bacteria, giardia, PFAS and almost 100% of total dissolved solids (TDS)
  • Optimal for fluoride removal, being the most effective method for removing fluoride from drinking water
  • Improves taste and odour, making drinking water more enjoyable
  • Provides consistent water quality regardless of changes in local supply
  • Reduces reliance on bottled water, saving money and reducing plastic waste
  • Supports healthier cooking and drinking, with cleaner water for everyday use

Common myths about reverse osmosis filters

RO water is unhealthy because it removes minerals

Reverse osmosis filters can remove some minerals from water, but drinking water is not the main source of minerals for most people. A balanced diet provides the minerals your body needs each day.

Reverse osmosis water filters are designed to reduce unwanted contaminants and provide cleaner, better-tasting drinking water.

RO filters waste too much water

Reverse osmosis systems do use some water to flush away impurities during the filtration process. However, our modern reverse osmosis systems are much more efficient than older models, and many of our customers consider the high level of purification well worth it.

It’s also worth comparing this with bottled water. Producing bottled water requires water, energy, packaging and transport. Plastic bottles can also contribute to landfill, river and ocean pollution. For many households, an RO filter offers a more practical and sustainable long-term alternative to regularly buying bottled water.

Fridge filters are just as good as reverse osmosis filters

Fridge filters are useful for improving the taste and smell of drinking water, especially by reducing chlorine. However, they are not designed to remove the same range of contaminants as a reverse osmosis water filter.

A reverse osmosis system provides a more advanced level of filtration, helping reduce dissolved solids, heavy metals and other impurities that standard fridge filters may not effectively target.

Choosing the right reverse osmosis system

Selecting the right reverse osmosis water filter system for your home depends on your household needs and setup. Here at Clean and Clear Water, we’re water purification specialists with over 30 years’ experience in providing filtration solutions. Our experienced technicians install RO units in homes across Sydney and Melbourne, and we can help you find the best option for your needs.

Before choosing an RO filter for your home, there are a few things to consider:

System type

Most of our customers prefer under sink reverse osmosis systems, which are compact and provide filtered water through a dedicated tap. If you have a larger home, you might want to consider pairing it with our whole house filtration solutions.

Household size and usage

The amount of water your household uses will influence the size and capacity of the system you need. Our under sink systems are ideal for permanent, high-volume filtration, hidden out of sight.

Water pressure and efficiency

Reverse osmosis systems rely on water pressure to operate effectively. Our modern systems are made with high-grade pressure housings and are designed to be more water-efficient than older models.

Maintenance and filter replacement

To keep your system performing at its best, filters and membranes need to be replaced periodically. Pre- and post-filters are typically replaced every 6–12 months, while the RO membrane lasts longer depending on usage and water quality.

At Clean & Clear Water, we offer free annual maintenance on all our filter systems, with guaranteed competitive prices on cartridge replacements.

Installation

While some systems can be installed as a DIY project, our professional installation service ensures optimal performance and peace of mind, particularly for more complex reverse osmosis filtration setups.

A 5-Stage or 6-Stage RO Filter

Both RO systems offer high-grade water purification. However, our 6-Stage reverse osmosis filter includes an alkaline or remineralising filter. It works by raising the pH levels and reduces the number of substances that can be absorbed by the body. It also infuses the water with minerals such as sodium, magnesium, potassium and calcium.

Call our friendly team for a quote to start the benefits of drinking cleaner, fresher water everyday. We service all greater Melbourne and Sydney suburbs.