5 Stage Reverse Osmosis Water Filters

Sophisticated, reliable and safe are the words that best describe our 5 Stage Reverse Osmosis Water Filter System.

All 5 stages contribute to making sure your water is clean, pure and safe to drink by removing any dissolved solids, metals, chemicals and chlorides.

Reverse Osmosis Pure Water

The 5 Stage Filtration Process

Stage 1 (1 micron sediment prefilter) removes sludge, dust and rust

Stage 2 (Granular Activated Carbon Filter) removes chlorine and provides membrane protection

Stage 3 (0.005 micron Ultrafine TFC RO Membrane, up to 100 litres per day) removes microparticles

Stage 4 (Prolonged Contact Time filter) removes fine grains and dust

Stage 5 (Carbon Polishing Post Filter) ensures your drinking water has a superb taste

Hand-Built and Factory Tested

Our 5 stage reverse osmosis filters are all manually built and go through strict quality testing. That’s why we’re confident about offering a comprehensive 5-year warranty. We know that our systems work and that they will reliably provide clean water for Australian homes for years to come.

The thorough process of our reverse osmosis system is already more than enough to ensure safe drinking for the whole family. But if you’re really looking for the best possible drinking water, we have an optional add-on:

Pi Water FilterPi Water Filter

Pi Water is the result of extensive research and experiments performed on plants in Japan during the 1960s.

Plants are able to survive and thrive beyond expectations with the health-giving properties of the cells, thanks to the special filtration system allowing bio-water to be created. This was developed by Drs Yamashita and Makino.

Reverse Osmosis DiagramHow Does a Pi Water Filter Work?

After passing through the Pi Water Filter, the resulting water has been shown to stimulate the self-healing properties of many plants and animals. It uses advanced technology to energise the water and generate life-giving energy.

It’s easy to install with existing water purifying systems. Coupled with your 5-Stage Reverse Osmosis system, you can get the ultimate protection and improve your health at the same time.


Dimensions (mm): 305 L x 75 D

Water Flow/m: 1.5 GPM

Water Pressure: 10 ~ 125psi

Water Temperature: 40 ~ 110°F

Ageing: 24 Months

The 5 Stages in Detail

While we call this water filter the 5 stage reverse osmosis system, reverse osmosis is actually just one of the stages. All the other stages are very important in producing the purest water and helping your water filter stand the test of time.

Pure Water

Stage 1 – 1 Micrometre Sediment Prefilter

The first stage of our reverse osmosis system is really just a prefilter that takes away any of the larger impurities in your water. It’s the standard first step of all our filters, including our two stage water filter, where anything larger than 1 micrometre (0.001 millimetres) is filtered out. For comparison, a human hair is usually around 70 micrometres in diameter. 1 micrometre is smaller than a typical bacterium that is invisible to the naked eye. This first stage probably sounds pretty thorough to you already and is still better than what many people have access to, however, there’s still a lot more that can be done to make your water perfectly pure.

Stage 2 – Granular Activated Carbon Filter

The second of the 5 stages helps to purify water by trapping pollutant molecules inside the carbon’s pore structure. Particularly effective in taking out chlorine molecules and similar 0.5 micrometres and larger. Active charcoal carbon filters have all sorts of applications, including air filtering, and can remove the majority of the bad tastes and odours from your water. It’s a similar concept to swallowing charcoal tablets that are supposed to absorb any nasty bacteria, etc, that are causing sickness. In relation to filters, all water has to pass through a significant amount of activated carbon to continue on through the system, meaning your water is already pretty pure at this point.

Stage 3 – Thin Film Composite Reverse Osmosis Membrane

This stage is where the ‘Reverse Osmosis’ happens. With a 0.005 micrometre (5 nanometre) membrane, there’s really not much that can get through this! A single water molecule is around 0.275 nanometres in size which means that if the reverse osmosis membrane were much smaller even water molecules might not even get through. Due to the ultra fine membrane, there’s a limited amount of water that can actually be processed each day, although it’s more than enough for the average family’s drinking water supply.

Stage 4 – Prolonged Contact Time Filter

In this stage, the water goes through a further filtering process to remove any remaining particles. This multi step filtering can help in neutralising the pH of your water, whether it was originally acidic or alkaline. A pH of 7, which is neutral, is the ideal level for your body, and you’ll notice the difference.

Stage 5 – Carbon Polishing Post Filter

This is the final stage before heading for your tap, and you’d be surprised the difference it makes to the taste and feel of your water. The ‘polishing’ effect makes the water so smooth and easy to drink, that you’ll just want more and more of it.

Optional Stage 6 – Pi Water Filter

While it doesn’t come included in the reverse osmosis package, the Pi Water Filter is a popular addition for anyone who wants amazing drinking water. While our 5 stage reverse osmosis system removes anything bad that could possibly be in the water, the Pi Water Filter actually adds potential health benefits to the water. Referred to as bio-water by some, it can add life-giving energy to your water.

Charcoal Carbon

5 Stage Reverse Osmosis System for your Home

It’s a rigorous process ensuring the health and safety of your whole family. 5 filter stages, using the most advanced technologies, ensures your water is free from impurities. Whether your aim is to have the best tasting water or the safest possible water, our reverse osmosis water filter gives you the best of both worlds.

While our system is highly sophisticated, it is still very affordable. Additionally, you’ll receive the best possible service because our technicians have a huge amount of experience installing reverse osmosis water purifying systems in Sydney, Melbourne, Wollongong and Central Coast homes.

To ensure the long lasting quality of your water, we’ll set up scheduled reminders for you so that you can know the ideal time for your filter cartridges to be replaced. There’s no point in having a reverse osmosis system if it’s not performing as well as it should be. While our 5 stage filters are as perfect as they come, like a vacuum, air conditioner, or any other appliance that needs filters replaced, your water filter will too.

Phone us now on 1300 734 156 and join the thousands of customers all over Australia we’ve already serviced!

Customer Review:

Filtap 5 Stage Reverse Osmosis Water Filter

“Great work, once again! The team are easy to deal with and very efficient. The technician was on time, organised and very professional. The job was clean and tidy.”

Jessica – ⭐⭐⭐⭐⭐ 5/5

Leave a Review