Whole House Water Filters in Australia: What to Look for When Buying

Choosing a whole house water filter is a bigger decision than a benchtop filter — it involves installation, ongoing maintenance, and affects every tap in your home. Here’s what actually matters when comparing systems.

See our full Whole House Water Filters Guide or call us on 1800 789 781 for a recommendation.

1. Number of Filtration Stages

Most whole house systems use 2–3 stages: a sediment stage (removes particles), a carbon stage (removes chlorine and improves taste), and sometimes a KDF stage (reduces heavy metals). More stages aren’t always better — match the stages to the contaminants in your water. For most Australian town water, a 2-stage sediment + carbon system is sufficient.

2. Flow Rate

A whole house filter must handle your home’s peak water demand without a noticeable pressure drop. Check the system’s rated flow rate (litres per minute) against your household’s typical usage. A system undersized for your home will cause pressure problems. Call us on 1800 789 781 for sizing advice.

3. Cartridge Size and Replacement Cost

Larger cartridges (20-inch “Big Blue”) last longer between replacements than standard 10-inch cartridges. Factor in the ongoing cartridge cost when comparing systems — a cheap system with expensive or hard-to-find cartridges is poor long-term value. Browse our replacement cartridge range.

4. Housing Quality

The filter housing takes the full pressure of your mains water supply. Look for housings rated to at least 100 PSI (690 kPa). Cheap plastic housings can crack under pressure — a whole house filter leak is a significant water damage risk.

5. Australian Warranty and Support

Buy from an Australian supplier with real support. When something goes wrong with a whole house system, you need someone who can help quickly. Call us on 1800 789 781.

Frequently Asked Questions