Reverse osmosis (RO) is a filtration technology that forces water through a semi-permeable membrane, removing a wide range of dissolved contaminants: heavy metals (lead, arsenic), fluoride, PFAS, microplastics, total dissolved solids (TDS), and many more. Because of its depth of purification, RO is often chosen when homeowners want drinking-water quality that’s significantly better than standard filters.
For households in Australia, especially in cities like Melbourne, RO filters can be worthwhile for:
- Cleaner tasting drinking water (and fewer bottled water purchases).
- Greater confidence if you have concerns about specific contaminants (old pipes, heavy-metal risk, PFAS, high TDS).
- Situations where other filters may not suffice (e.g., fluoride removal, microplastics, high dissolved solids).
- A long-term investment in water quality and appliance longevity (if you pair with proper pre-filters and maintenance).
That said, RO systems might have trade-offs (space under sink, slower flow, potential wastewater or reject water, cost of membrane replacements). So choosing the right system is as important as choosing any system.
Five Australian RO Filter Brands
Here’s how the five brands you specified compare in terms of what they emphasise, strengths, and what kind of buyer they best serve.
| Brand | What They Offer & Key Features | Best For |
|---|---|---|
|
PureFlow |
Locally engineered 5-stage RO systems designed for Melbourne’s water. Removes chlorine, fluoride, PFAS, heavy metals and microplastics down to 0.0001 micron, then reintroduces essential minerals for balanced taste. Available as under-sink or combined whole-home setups. |
Melbourne homeowners wanting trusted local installation, faster service, and filtration proven for Australian conditions. |
|
Earths Water |
RO systems that emphasise purificationplus remineralisation and alkalisation, claiming ~99 % contaminant removal and improved taste. |
Families focused on alkaline taste and remineralised water, less concerned with service locality. |
|
Great Water Filters |
4-stage RO (e.g. ES3) operating at ~0.0001 micron, strong fluoride and heavy-metal removal, optional mineral stage. |
Buyers attracted by a lower price point but willing to compromise on build quality and advanced features.. |
|
Living Whole |
Australian-built under-sink and benchtop RO systems with NSF-certified components, membrane ratings around 0.0005 micron, optional remineralisation. |
Best for renters and people who don’t mind manually filling up the system with water |
|
Complete Home Filtration |
Multi-stage RO with sediment, carbon and RO membrane filters; claims up to 99.8 % contaminant removal. |
Homes after straightforward, reliable RO drinking-water systems with minimal extras. |
How to Choose the Best RO System for Your Home
Here’s a practical step-by-step guide tailored for RO filters, so you can determine which brand is right for you.
Step 1: Identify your drinking-water needs
- Do you have concerns about fluoride, heavy metals, PFAS, nitrates, or TDS in your tap water?
- Are you looking purely for drinking water (kitchen sink) or broader coverage (whole-home)?
- If your concern is specific (e.g., old pipes, bore water, rain tank), you may require a higher spec RO.
- Get a water test if possible for the contaminants you suspect.
Step 2: Choose installation type
- Under-sink RO (most common): integrated beneath kitchen sink, separate tap for filtered water.
- Benchtop/Countertop RO: easier to install, but may have slower throughput or require reservoir, takes up bench space and requires manual refilling.
- Whole-home RO is rarer and more expensive; most RO systems focus on drinking/cooking taps. PureFlow offers a whole house + RO combined solutions.
Step 3: Compare key specs & features
- Filtration stages: Pre-filter (sediment), Activated Carbon, RO membrane, Post-filters (remineralisation, alkaliser).
- Membrane rating: lower micron number = finer filtering (e.g., 0.0001 micron).
- Remineralisation/alkalisation stage: Do you want minerals added back?
- Certification: NSF, ANSI, or Australian standard certifications.
- Waste water / reject rate: RO has some water waste, check efficiency or tank size.
- Flow/rate & storage: Some systems supply a tank so you don’t wait for filtered water.
- Space/installation demands: Under-sink space, separate faucet, plumbing.
- Filter/membrane replacement cost & interval.
Step 4: Fit to your household
- For a small household or single drinking tap: a simpler under-sink RO might suffice.
- For a large family who want lots of filtered water fast: choose a higher flow rating, bigger tank/under-sink system and maybe premium brand with strong removal + remineralisation.
- If you live in Melbourne and prefer local support, quick service, use PureFlow.
- If taste and alkalinity matter: pick one with remineralisation.
- If budget is tight: choose simpler system but accept more frequent maintenance or fewer extras.
Step 5: Consider long-term cost & maintenance
- Initial cost of equipment + installation.
- Annual filter cartridge cost + membrane cost every few years.
- Servicing: ease of getting replacements locally.
- Efficiency/ waste water: RO systems typically discard some water; more efficient units waste less.
- Space and operation: ensure you’re comfortable with the under-sink setup or tank in cabinet.
Step 6: Installation & support
- Ensure installation by a licensed plumber or approved installer (especially mains connected systems).
- Check warranty: parts, labour, membrane.
- Local support matters for service/accessories (Melbourne-based coverage is a plus for you).
- Ensure you understand how to replace filters, how notifications/bypass work, and storage tank cleaning if applicable.
Final Recommendation for Melbourne Homes
Reverse osmosis remains one of the most effective technologies for ultra-pure drinking water, but the right system depends on how you live.
If you’re in Melbourne, a locally designed, fully supported RO system will give you better protection, faster service, and easier long-term care.
PureFlow’s combination of 0.0001-micron purification, mineral rebalancing, and same-day local installation makes it a dependable choice for households that value both purity and practicality.
Book Your Free Water Test to discover which RO setup suits your home and what’s really in your tap water.
