Whole House Water Filter vs Under Sink Filter: Which Is Better in Australia?

Should you filter all the water in your home or just the water you drink? If you’re researching water filtration systems in Australia, this is one of the most common questions homeowners ask. Many assume it’s a strict choice between a whole house water filter and an under sink water filter.

But here’s the reality: It’s not a competition - it’s a complete system when used together.

Think of it this way:

• A whole house system is your foundation for clean water across your entire home
• An under sink system is your precision tool for ultra-pure drinking water

At My Water Filter, we help Australian households design complete water filtration systems that deliver both everyday protection and premium drinking water quality.

If you want a fast, clear answer:

• Whole house water filter: Treats all water entering your home (showers, laundry, taps)
• Under sink water filter: Provides high-purity drinking water at a single tap

Best solution for Australian homes: Use both systems together for complete protection and performance.

A whole house water filter is installed at the Point of Entry (POE), where water first enters your property.

What it does

Filters every drop of water before it flows to:

• Showers
• Washing machines
• Dishwashers
• All taps

What it removes

Depending on the system, it removes:

• Chlorine
• Heavy sediment
• Heavy metals
• PFAS and other chemicals

Key benefits

• Protects plumbing and appliances from scale and sediment
• Improves skin and hair by reducing harsh chemicals
• Reduces chlorine exposure during hot showers

A whole house filter is the foundation of clean water in your home.

An under sink water filter is installed at the Point of Use (POU), which is typically inside your kitchen cabinet.

What it does

Delivers a dedicated stream of purified water for:

• Drinking
• Cooking

What it removes

Targets ultra-fine contaminants, including:

• Microscopic impurities
• Taste and odour compounds
• Fluoride and PFAS (with specific systems)

Key benefits

• Provides safe, high-quality drinking water
• Significantly improves taste and clarity
• Allows targeted, precision filtration

An under sink filter is your final step for premium drinking water.

These systems are not interchangeable—they are complementary.

The honest answer: Neither is “better” as they solve different problems.

• A whole house filter alone improves overall water but doesn’t fully optimise drinking water
• An under sink filter alone gives clean drinking water but leaves the rest of your home exposed

The best water filtration setup in Australia combines both systems.

1. Whole House Filters Don’t Fully Optimise Drinking Water

Whole house systems operate at high flow rates (up to 40+ litres per minute). This is essential for maintaining pressure, but it limits ultra-fine filtration.

They effectively remove:

• Chlorine
• Sediment

But they don’t provide the final “polish” for drinking water.

2. Under Sink Filters Deliver High-Purity Water

Under sink systems run at slower flow rates (2–3 litres per minute).

This allows:

• Longer filtration contact time
• Deeper contaminant removal
• Superior taste and clarity

3. Together, They Create a Complete System

• Whole house filter: Protects your home, appliances, and skin
• Under sink filter: Protects what you drink

One handles everything. The other perfects what matters most.

4. Better Performance and Longer Filter Life

Without pre-filtration:

• Under sink filters clog faster
• Replacement costs increase

With a whole house system:

• Sediment and chlorine are removed first
• Under sink cartridges last significantly longer

This improves efficiency and reduces long-term costs.

5. Ideal for Australian Water Conditions

A dual system works across all Australian water sources:

• Town water: Removes chlorine + infrastructure contaminants
• Rainwater: Removes sediment + adds UV protection for bacteria

A combined system is the most effective solution for Australian homes.

At My Water Filter, we’ve designed complete filtration packages to remove the guesswork:

ULTRAPURE ULTIMATE Home Filtration System + Undersink System

• Advanced 3-stage whole house filtration
• Super Seal cartridges (no bypass)
• Comes with a premium under sink drinking water system

Best for maximum protection and performance.

ULTRAPURE Home Filtration System + Undersink System

• Reliable 2-stage whole house filtration
• Strong chlorine and sediment removal
• Precision under sink filtration for drinking water

Best for balanced performance and value.

Choose a Whole House Filter if:

• You want chlorine-free showers
• You want to protect appliances and plumbing
• You want cleaner water from every tap

Choose an Under Sink Filter if:

• You want better-tasting drinking water
• You’re in a rental property
• You only need filtration at the kitchen

Choose BOTH (Recommended)

• You want complete water quality
• You want both comfort and safety
• You want long-term cost efficiency

This is the best setup for most Australian households.

The ideal solution is:

Whole House Filter (POE) + Under Sink Filter (POU)

However, the right system depends on:

• Your water source (town vs rainwater)
• Local contaminants
• Household size

At My Water Filter, we help tailor systems to your exact needs.

It’s time to move beyond the idea of choosing just one system.

• Whole house filter: Your first line of defence
• Under sink filter: Your final refinement

Together, they deliver complete, high-performance water filtration across your entire home.

Explore My Water Filter’s complete systems or speak with our team for tailored advice.

For the cleanest water in your home and the purest water in your glass, you need both.