Most Australian households don’t actually have truly “clean” water flowing from their taps; they have treated water.
While municipal treatment plants do an excellent job of making water biologically safe, the journey from the treatment facility to your home can introduce a range of contaminants. On top of that, water quality varies significantly across Australia, meaning what’s in your water depends heavily on where you live.
Depending on your location, your water may contain:
- High levels of chlorine
- Sediment and rust from ageing pipes
- Heavy metals
- Emerging contaminants like PFAS
Choosing the wrong system can lead to:
- Wasted money
- Reduced water pressure
- Incomplete protection for your household
This step-by-step guide will show you exactly how to choose the right whole house water filter in Australia, so you can confidently invest in a system that actually works for your home.
Table of Contents
What Is a Whole House Water Filter (and What Does It Actually Do)?
A whole house water filter is a Point of Entry (POE) system installed at your main water line. It filters all incoming water before it reaches your taps, showers, appliances, and laundry.
What a whole house filter typically removes:
- Chlorine and volatile organic compounds (VOCs)
- Sediment, dirt, and rust
- Chemicals, bad tastes, and odours
- Some heavy metals (depending on cartridge type)
What it doesn’t always remove:
- Dissolved salts and hard water minerals (calcium and magnesium)
- Fluoride (requires specialised filtration)
Important Note: No single system removes everything. The best results come from choosing a system tailored to your specific water quality.
Step-by-Step: How to Choose the Right Whole House Water Filter
Step 1: Test and Understand Your Water Quality
Water quality differs dramatically across Australia.
- Mains water (urban): Typically contains chlorine and disinfection by-products
- Bore or rainwater (rural): Often contains sediment, bacteria, and organic matter
Common Australian water issues:
- Urban areas → High chlorine
- Regional areas → Sediment and agricultural runoff
- WA, QLD, SA → Hard water and scale buildup
What to do:
- Review your local council water report
- Use a home water test kit
Step 2: Identify Your Main Water Problems
Let your water symptoms guide your decision:
- Chlorine smell/taste → Carbon filtration
- White scale buildup → Hard water system
- Poor lather, dry skin → Soft water system
- Dirty or discoloured water → Sediment filtration
Step 3: Choose the Right Type of System
There are three primary system types:
A. Filtration Systems
Best for: Chlorine, chemicals, taste, and odour
Benefit: Clean, safe water for the whole home
B. Hard Water Systems
Best for: Limescale and mineral buildup
Benefit: Prevents scale, protects appliances
C. Soft Water Systems
Best for: Severe hardness
Benefit: Removes calcium and magnesium for softer skin, hair, and laundry
Step 4: Consider Flow Rate and Household Size
Choosing the wrong size system can lead to low water pressure.
- 1–2 bathrooms: 10" x 4.5" system
- 3–4+ bathrooms: 20" x 4.5" high-flow system
Rule: Always size up if you're unsure, especially for larger households.
Step 5: Check Filtration Stages and Technology
Multi-stage systems deliver better performance because they protect each stage. A high-quality setup typically includes:
- Sediment pre-filter (captures dirt and rust)
- Carbon filtration (removes chlorine and chemicals)
- Optional specialised media (for metals or scale)
Step 6: Consider Maintenance and Running Costs
Look beyond the upfront price. Here are some things to consider:
- Cartridge replacement: Every 6–12 months
- Servicing: DIY vs plumber-required
- Long-term cost: Higher-quality systems often cost less over time
Step 7: Do You Also Need a Drinking Water System?
This is critical. A whole house filter improves water for:
- Showering
- Cleaning
- General use
But it does not fully purify drinking water. For optimal results, pair your system with an undersink drinking water filter to remove microscopic contaminants like fluoride.
Best Whole House Water Filter Systems in Australia
Premium All-in-One Protection (Best Overall)
ULTRAPURE ULTIMATE Home Filtration System + Undersink System
- Ideal for: Families wanting complete coverage
- Benefit: Full-home filtration + ultra-pure drinking water
- Premium “set-and-forget” solution
High-Value Complete Home System
ULTRAPURE Home Filtration System + Undersink System
- Ideal for: Standard Australian households
- Benefit: Strong contaminant reduction + great-tasting drinking water
- Best value bundle
For Hard Water Problems
ULTRAPURE Hard Water System
- Ideal for: Scale buildup issues
- Benefit: Prevents mineral deposits and protects appliances
For True Soft Water
ULTRAPURE Soft Water System
- Ideal for: Severe hardness
- Benefit: Removes calcium and magnesium for significantly better comfort
Whole House vs Under Sink: Do You Need Both?
This isn’t an either/or decision, as they work best together.
-
Whole House Filter = Protection
Removes chlorine, sediment, and chemicals across your home -
Under Sink System = Purification
Delivers high-quality drinking and cooking water
Best practice: Combine both for complete water quality.
Common Mistakes to Avoid
- Choosing based on price alone
- Ignoring your local water quality
- Buying an undersized system
- Expecting one filter to do everything
- Overlooking maintenance costs
Final Thoughts
There is no one-size-fits-all solution when it comes to water filtration. The right system depends on:
- Your local water quality
- Your household size
- Your specific water concerns
By choosing a system tailored to your needs, you’re not just improving your water; you’re also protecting your home, your appliances, and your family’s long-term health.
For expert guidance and premium systems built for Australian conditions, explore the full range at My Water Filter.
Tailored Filtration is Essential: Because water quality varies significantly across Australia, choosing the right whole house water filter requires testing your local water and identifying specific issues like high chlorine, sediment, or hard water.
Size Matters for Water Pressure: Selecting the correct system size based on your household's water usage and the number of bathrooms is crucial to maintain steady water pressure throughout the home.
Comprehensive Protection Requires Two Systems: While a whole house system protects your plumbing, appliances, and skin by filtering all incoming water, it is best paired with a dedicated under sink system to fully purify your drinking and cooking water.
Hear from Our Satisfied Customers
What Is a Whole House Water Filter?
A whole house water filter is a Point of Entry (POE) system installed on your main water line. It filters all the incoming water before it reaches your showers, laundry, taps, and appliances, effectively removing common contaminants like chlorine, sediment, and unpleasant odours.
Do I Need Both a Whole House Filter and an Under Sink System?
Yes, they are designed to work together for complete protection. A whole house filter provides clean water for bathing and general household use, whilst an under sink system provides highly purified water specifically for drinking and cooking, removing microscopic contaminants that a whole house system might miss.
How Do I Choose the Right Size System for My Home?
To avoid a drop in water pressure, you must match the system to your household size. A 10" x 4.5" system is generally sufficient for a home with 1 to 2 bathrooms. If your home has 3 or more bathrooms, you should opt for a 20" x 4.5" high-flow system.
Will a Standard Whole House Filter Fix Hard Water Problems?
Not necessarily. Standard filtration systems are excellent for removing chlorine, dirt, and rust, but they do not always remove dissolved salts and hard water minerals like calcium and magnesium. If you are experiencing white scale buildup on your taps and appliances, you will need a specialised hard water or soft water system.
