Whole House Water Filter and Softener Systems in Australia: Do You Need Both?

Water filters and water softeners solve different problems — and many Australian homes benefit from both. Here’s a clear explanation of what each does, when you need a combo system, and how to choose the right setup.

Browse our whole house filter range or see our Whole House Water Filters Guide.

Water Filter vs Water Softener: What’s the Difference?

Do You Have Hard Water?

Hard water is common in many parts of Australia, particularly in inland and regional areas. Signs of hard water include:

• White scale deposits on taps, showerheads, and kettles
• Soap that doesn’t lather well
• Spots on glassware and dishes after washing
• Reduced efficiency of hot water systems and appliances

Your local water utility’s annual water quality report will list the hardness level of your supply. Water above 200 mg/L (as CaCO₃) is generally considered hard enough to warrant softening.

When Do You Need Both?

If your water is both hard and contains chlorine, sediment, or other contaminants (which is common in Australian town water), a combo approach makes sense:

• Stage 1 — Sediment pre-filter: removes particles that would foul the softener resin
• Stage 2 — Water softener: removes hardness minerals via ion exchange
• Stage 3 — Carbon filter: removes chlorine, chloramines, and taste/odour compounds

The softener should always come after the sediment pre-filter (to protect the resin) and before the carbon filter (chlorine degrades softener resin over time).

Benefits of a Whole House Filter + Softener System

• Protects appliances and plumbing — scale buildup from hard water reduces the efficiency and lifespan of hot water systems, washing machines, and dishwashers
• Better skin and hair — soft, chlorine-free water is gentler on skin and reduces dryness
• Cleaner dishes and laundry — soft water allows detergents to work more effectively
• Better-tasting water — the carbon filter stage removes chlorine and taste/odour compounds
• Single point of maintenance — one system to manage rather than multiple point-of-use filters

How to Choose the Right System

1. Test your water — check your utility’s water quality report or use a water test kit to confirm hardness level and contaminants
2. Check your flow rate needs — ensure the system can handle your household’s peak demand without pressure drop. Our Twin Big Blue system handles high flow rates suitable for most Australian homes
3. Look for NSF certification — confirms the system removes what it claims
4. Consider installation — combo systems require plumbing connection to the main supply line. A licensed plumber is recommended

Not sure what you need? Call us on 1800 789 781 and we’ll recommend the right configuration based on your water supply and household size.

Frequently Asked Questions