
Reverse Osmosis Water Filter
Recognised as one of the best available technologies for producing best quality drinking water. No other home water filtration system can offer you as much protection and reliability, the reverse osmosis water filter is capable of removing up to 98 percent of total dissolved solids (TDS), Fluoride, Lead, heavy metals, ions, bacteria, viruses, chlorine, colloids and silt, and more from your water supply.
Buy Reverse Osmosis Water Filter Systems Online From MDC Water
At MDC Water we offer a wide range of best quality reverse osmosis water filter systems for Australian home and business (and yes we supply New Zealand and the rest of the world too!).
Browse through a wide range of options,compare features, and select the perfect system for your needs. With just a few clicks, you can complete your purchase and have the system delivered right to your doorstep with FREE delivery.
Undersink Reverse Osmosis System with Alkaline
Upgrade your drinking water with Aquala’s advanced tankless RO filtration system. Featuring five stages of purification, a high-performance RO membrane, and an alkaline remineralisation filter, it ensures mineral-rich, alkaline water that tastes great. The integrated TDS display monitors quality in real time, while the tankless design guarantees freshness and eliminates stagnant water.



































































































Next Generation Tankless Reverse Osmosis Water Filter
Aquala P500 Delivers Pure Peace of Mind for Aussie Homes
In a traditional RO filter, the purified water is stored in a tank for later use. However, a tankless reverse osmosis water filter eliminates the need for a storage tank. Instead, it uses a direct flow-through design, where water is filtered on-demand, providing a continuous supply of purified water without any waiting time.
Our reverse osmosis water filters can eliminate up to 96 percent of total dissolved solids (TDS), FLUORIDE, lead, heavy metals, ions, bacteria, viruses, chlorine, colloids, silt, and various other contaminants like forever chemicals, PFAS (per-and poly fluoroalkyl substances), PFOA (perfluorooctanoic acid) and PFOS (perfluorooctane sulfonate) from your water source. This ensures that you have access to Pure and Safe drinking water.

Next-generation All-in-one Reverse Osmosis Water Station
Benchtop Reverse Osmosis System with Instant Hot and Cold Water Dispenser
Introducing our AQUALA, your go-to solution for an all-in-one water dispenser. Experience the convenience of instant access to both hot and cold filtered water with our innovative benchtop appliance. Equipped with a built-in reverse osmosis filtration system, our dispenser effectively eliminates a wide range of impurities, such as heavy metals, viruses, bacteria, fluoride, chlorine, and more. With customizable water temperatures and a plumbed-in design, enjoy a continuous supply of great-tasting and purified drinking water. Trust MDC Water for the ultimate hydration experience.
Quick Change Undersink Reverse Osmosis Water Filters
Reverse Osmosis & Alkaline Mineral Filter, HQ7-4FR-ERMP
Reverse Osmosis & Alkaline Mineral Filter with Booster Pump, HQ7-4FR-ERMP-P
Reverse Osmosis System, HQ7-4FR-SPRP
Filters
AQUALA P500 Tankless Reverse Osmosis System
Tankless RO Water Filter: Aquala P500 Delivers Pure Peace of Mind for Aussie Homes
If you’re searching for a reverse osmosis water filter that actually gives your family cleaner, healthier water—and proof of it every single glass—this is the one Australians are trusting. The Aquala P500 is Australia’s first WaterMark certified tankless RO water filter with alkaline remineralisation and real-time TDS display. That means you can stop worrying about PFAS, fluoride, chlorine taste, or “forever chemicals,” and finally have water you’re proud to pour for your kids.
Everyday Life, Upgraded—No More Bottled Water or Chlorine Smell
Picture this: it’s Monday morning and you’re filling your kid’s bottle before school. Instead of the chlorine hit from Sydney tap water or the hard taste Perth locals know too well, you get crisp, fresh water—just like you always wanted. For many families, the Aquala P500 is the quiet kitchen hero: no bulky tanks, no juggling jugs, just pure water straight from the tap, ready for your next cuppa, the baby's formula, or a quick refill before heading out.
How It Works—Made Simple
Aquala’s tankless RO water filter uses six stages of advanced filtration, including a high-performance reverse osmosis membrane and a final alkaline remineraliser. That last step isn’t just marketing—your water gets back the healthy minerals and a balanced pH of 7.5~8.5, so it tastes alive, not flat. The built-in TDS display shows you real-time water quality, so you know exactly what you’re drinking. And being tankless, there’s no risk of stale or stagnant water, just a direct flow—fast, fresh, and pure.
Key Features & Materials
- Tankless RO water filter—space-saving and always fresh
- Alkaline remineralisation—healthy minerals restored, pH 7.5–8.5
- WaterMark certified for plumbing and insurance peace of mind
- TDS display—real-time proof of water quality
- High flow rates: 1.3L/min (purified), 2L/min (filtered)
- 2:1 pure-to-waste ratio—eco-friendly, uses less water than old tanked systems
- DIY installation—full kit and step-by-step guide included, but a licensed plumber is always recommended for compliance and peace of mind
- Strong Australian support and 1-year warranty
- Connects to any filtered water tap and most 3-way mixer taps for seamless upgrades or new installs
Space & Design—Fits Real Aussie Kitchens
Forget about sacrificing precious cupboard space. The Aquala P500’s tankless design takes up 60% less room than a traditional RO, so you can actually use your under-sink storage. It’s a favourite among renovators and anyone tired of kitchen clutter. Whether your home is a Bondi apartment or a Brisbane family house, this unit fits in quietly, blending with your kitchen—not taking it over.
Installation & Compatibility
DIY installation? Absolutely—the Aquala P500 is built for easy setup, with every fitting you need in the box. Most Aussies get it running in under an hour, and the instructions are written for real people (not engineers). If you want total peace of mind, a licensed plumber can handle the install and guarantee everything is up to spec.
It fits standard Australian plumbing and connects effortlessly to all filtered water taps and most existing 3-way mixer taps, making it a perfect upgrade or addition for almost any kitchen.
Maintenance & Support
- Quick-change filter cartridges—done in minutes, no tools or mess
- Strong, local Australian support team ready to help (no offshoring)
- Ongoing filter cost is honest and upfront—no hidden subscriptions required
- 1-year warranty and free shipping Australia wide
Real Talk / FAQ
- Does it really save space? Yes—no bulky tank = 60% less under-sink clutter
- Is “too pure” water a thing? The final remineralisation stage means your water keeps its healthy balance and tastes great
- What about ongoing cost? Filters last 6–24 months; replacements are easy and fairly priced (the only real recurring expense)
- Will I hear it running? Sometimes you’ll notice a gentle hum when filling, but it’s much quieter than most dishwashers
- Can I use it anywhere? It’s designed for Aussie municipal tap water—can potentially work with tank water
Specs at a Glance
- 6-stage filtration with alkaline remineralisation
- WaterMark certified (meets all AU plumbing & insurance codes)
- TDS display: real-time water quality
- High flow: 1.3L/min purified, 2L/min filtered
- 2:1 pure-to-waste ratio
- DIY installation (plumber recommended), all fittings included
- Connects to all filtered water taps & most 3-way taps
- Fits under any standard kitchen sink—compact, space-saving
- 1-year warranty, free Australia-wide shipping
Reverse Osmosis & Alkaline Mineral Filter, HQ7-4FR-ERMP
- Removes Fluoride and ions up to 85%.
- Removes chlorine, bad tastes & odors, organics.
- Removes/Reduces bacteria, viruses, colloids, silt, E-coli, giardia.
- Equipped with a Mineral & Alkaline filter.
- Doesn’t not run on electricity, run on the mains water pressure.
- Inlet Working Pressure: 45 – 65 PSI (3 – 4.5 bar).
Reverse Osmosis & Alkaline Mineral Filter with Booster Pump, HQ7-4FR-ERMP-P
- Removes Fluoride and ions up to 92%.
- Removes chlorine, bad tastes & odors, organics.
- Removes/Reduces bacteria, viruses, colloids, silt, E-coli, giardia.
- Equipped with Booster Pump and Mineral-Alkaline filter.
Reverse Osmosis System, HQ7-4FR-SPRP
- Removes Fluoride and ions up to 85%.
- Removes chlorine, bad tastes & odors, organics.
- Removes bacteria, viruses, colloids, silt, E-coli, giardia.
- Doesn’t not run on electricity, run on the mains water pressure.
- Inlet Working Pressure: 45 – 65 PSI (3 – 4.5 bar).
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What is a Reverse Osmosis Filter and why do homes and offices need one?
Reverse osmosis (RO) is a water purification process that uses a semi-permeable membrane to remove dissolved solids and impurities. Reverse osmosis membrane has around 0.1 Nano (0.0001 micron) pore size which contributes to a very high removal capability of Fluoride, Lead, heavy metals, ions, bacteria, viruses, calcium, chloride, copper, iron, magnesium, nitrate, nitrite, colloids and silt, and many more, thereby producing ultra pure great tasting water.
Reverse osmosis (RO) water filters removes forever chemicals, PFAS (per-and polyfluoroalkyl substances), PFOA (perfluorooctanoic acid) and PFOS (perfluorooctane sulfonate) from your water source. This ensures that you have access to Pure and Safe drinking water.
A reverse osmosis process has several filters that work together to remove impurities from your drinking water. Generally, the RO system involves four stages: The first filter is a sediment filter that removes particles such as dirt, sand, and rust. The second filter is a
carbon filter that removes chlorine, chemicals, and other contaminants. The third filter is a reverse osmosis membrane that removes dissolved solids such as fluoride and lead. The fourth filter is a carbon
polishing post filter that removes any remaining impurities in the water such as chlorine, taste, and odor.
A reverse osmosis water filter is excellent because:
- It is very effective in removing contaminants from water
- It is easy to install and maintain
- It is relatively affordable
- Designed to fit into the existing water supply
Compared to other water filter systems, osmosis reverse water filters have a higher quality of filtration. They are also more effective in removing contaminants such as fluoride and lead. If you are looking for a water filter system that can provide you with clean, safe, and pure drinking water, then a reverse osmosis water filter is the best option for you. Purified water comes out the tap at the normal water pressure you would expect.
Water purification is the process of removing undesirable chemicals, materials, and biological contaminants from water. The goal is to produce water fit for specific purposes. Most water is purified for human consumption (drinking water), but water purification may also be designed for a variety of other purposes, including medical, pharmacological, chemical, and industrial applications.
Note that a reverse osmosis water system uses extra water. As part of the filtration process, contaminants are removed and these are washed out through the waste water exit. This waste water can be recycled for alternate use, or washed down the drain. Waste water is normally generated whenever purified water is used.
Optional post stage
Mineral Filter, The reverse osmosis process will remove all contaminants and minerals and a remineraliser filter will add minerals back to the water which will raise the pH level of the water to be alkaline.
RO filter is recommended for people who want the highest quality of water possible or for those who have water with a high TDS (total dissolved solids) level.
If you are looking for a reverse osmosis water filter system that can provide you with the highest quality of water, then a system with a mineral post filter is the best option for you.
Frequently Asked Questions about Reverse Osmosis Water Filters








Frequently Asked Questions about Reverse Osmosis Water Filters
Reverse osmosis is a highly effective water purification process utilised by advanced filtration systems. By employing a semipermeable membrane, reverse osmosis filters exert pressure on water, allowing pure water molecules to pass through while blocking impurities, contaminants, and particles. This process ensures the removal of harmful substances such as bacteria, viruses, heavy metals, chlorine, fluoride, pesticides, nitrates, sulfates, and various other contaminants commonly found in tap water.
Yes, reverse osmosis RO water filter is designed to function efficiently with diverse water sources, including municipal water supplies, well water, tank watre and tap water. In general, most standard reverse osmosis systems are designed to handle TDS levels up to 600 ppm.
However, it is crucial to assess the specific impurities present in your water and choose a reverse osmosis system that can adequately address those contaminants
Reverse Osmosis system effectively eliminates around 96% of all dissolved impurities, TDS and salt.
Reverse osmosis water filters excel at removing a wide range of impurities, including but not limited to:
Viruses and Bacteria: polio, rotovirus, norovirus, E. coli, Legionella.
Heavy metals: lead, ferrous iron, arsenic, cadmium, chromium, selenium, mercury
Chemicals: Chlorine, bromine, flouride, iodine, nitrates, sulfates, pharmaceuticals, organic acids, proteins.
Contaminants: Sediment, rust, dirt, bad taste, and odours.
Others: (VOCs), PCBs, BPA, and many other contaminants.
While reverse osmosis filters are highly efficient at eliminating contaminants, they also might remove beneficial minerals such as calcium and magnesium from water. However, advanced reverse osmosis systems often incorporate additional stages, such as remineralisation, to reintroduce essential minerals into the purified water, ensuring a more balanced and healthier drinking water experience.
Yes, reverse osmosis systems produce both purified water and waste water. The ratio varies depending on the system, but it’s typically around 3:1 or 4:1 (waste water to purified water). However we supply
modern RO systems which designed to be more water-efficient and reduce waste, it’s up to 1:3 (waste water to purified water)
Yes, many reverse osmosis systems are designed for DIY installation. Our RO systems are DIY, easy to install and come with detailed installation instructions, reverse osmosis filtre installation videos and all the
necessary components. However, if you’re not comfortable with plumbing or have specific concerns, it’s advisable to hire a professional plumber or handyman to ensure proper installation.
1. Standard Faucets: These are basic faucets that come with a separate handle for filtered RO water, Our filtered water taps are available in many finishes and colours, See our options
2. Three Way Mixer Taps: These faucets have two handles—one for hot and
cold water, and another dedicated handle for filtered water. They eliminate the need for a separate filtered water faucet, See our options
Most advanced reverse osmosis systems require a power source to operate. The power is typically used to drive the water through the membrane, which is a crucial part of the reverse osmosis process. Additionally, some systems may have additional components such as pumps, TDS meter, lifespan indicators or electric valves that also require power.
However,there are some non-electric reverse osmosis systems available that do
not rely on electricity, they run on the water pressure (more than 40 psi).