Installing a Whole House Water Filter in Australia: What You Need to Know

Installing a whole house water filter involves connecting to your mains water supply — which in most Australian states requires a licensed plumber. Here’s what to expect from the process.

See our full Whole House Water Filters Guide or call us on 1800 789 781 for advice on choosing the right system.

Why a Licensed Plumber Is Required

In most Australian states, any work that involves cutting into or connecting to a pressurised mains water line must be done by a licensed plumber. This is a legal requirement — not just a recommendation. DIY plumbing on pressurised lines can void your home insurance and is illegal in some states. Always use a licensed plumber for whole house filter installation.

What the Installation Involves

1. Choosing the installation point: The filter installs at the mains water entry point to your home — typically where the water meter connects to your internal plumbing. Your plumber will identify the right location.
2. Shutting off the mains water: The plumber shuts off the mains supply, cuts into the pipe, and installs the filter housing with appropriate fittings.
3. Installing a bypass valve: A bypass valve allows you to isolate the filter for cartridge replacement without shutting off the whole house water supply. This is worth requesting if not included.
4. Pressure testing: The plumber restores water supply and checks all connections for leaks.
5. First flush: Run water through the system for several minutes to flush any residual media from new cartridges before use.

What to Prepare Before the Plumber Arrives

• Know where your mains water shutoff valve is
• Have the filter system unboxed and ready
• Clear access to the installation area
• Have the product manual available for the plumber

Ongoing Maintenance (DIY-Friendly)

Once installed, cartridge replacement is straightforward and doesn’t require a plumber — use the bypass valve to isolate the filter, unscrew the housing, swap the cartridge, and restore flow. Replace sediment cartridges every 3–6 months and carbon cartridges every 6–12 months. Browse our replacement cartridge range.

Frequently Asked Questions