3 Stage 20″ Big Blue Whole House Water Filter Softener System [Stainless Steel]

Key Features

  • Whole house water filter helps reduce calcium scale build-up on hot water systems, taps and household appliances while providing softer-feeling water throughout the home.
  • Three-stage filtration combining sediment removal, water softening, chlorine and heavy metal reduction.
  • One installation point filters water supplied to every tap in the home.
  • Cartridges chosen are designed for Whole House Water Filter Perth and Western Australian scheme water.
  • High-flow design suitable for households of up to nine people.
  • Extra length cartridges require less frequent changing
  • No power required.

$3,199.00

Perth’s hard water can take its toll on your home.

Calcium scale builds up on shower screens, taps and inside your hot water system, washing machine and dishwasher, wearing them our faster than they should.

This 3-stage system treats the water where it enters your home, so every tap in the home runs cleaner water, not just the kitchen sink.

Designed for larger households, the high-capacity 20″ cartridges provide excellent flow while helping reduce sediment, chlorine and heavy metals, as well as softening Perth hard water.

If you have bore water, it will require testing to establish correct cartridge combination.
Testing can be do through Eurofins APAL Belmont. The test result can then be viewed by us to begin the discussion on your needs.

How it Works

Water passes through three filtration stages before entering your home’s plumbing.

The high-flow design allows multiple taps to operate simultaneously without a noticeable loss of pressure in most Perth suburbs. Where unusually low or high mains pressure exists, we’ll discuss the most suitable solution during your consultation.

Whole House Water Filter Three Stages of Filtration

Stage 1 – Sediment Filter 5 μm

Reduces dirt, dust, rust and other suspended particulates, helping protect the cartridges that follow. In Perth’s water conditions, we generally recommend replacing the sediment cartridge every six months to maintain optimum performance.

Stage 2 – Water Softening Resin

Using an ion exchange process, reduces calcium hardness to help minimise scale build-up on plumbing fixtures, hot water systems and household appliances while improving the feel of the water.

Stage 3 – Chlorine Removal and Heavy Metal Reduction Cartridge 1 μm

Reduces chlorine taste and odour. Manufacturer testing reports chlorine reduction of up to 99.9% under specified test conditions.

Using an ion exchange process, reduces a range of heavy metals while conditioning the water before it is distributed throughout the home.

Installation

A licensed plumber is required for installation.

Every installation includes a bypass valve, allowing the filtration system to be isolated during maintenance without interrupting the household water supply.

Installation is not included in the listed price.

If you’re located in Perth, we can arrange installation through one of our trusted licensed plumbing partners. Contact us for an installation-inclusive quotation.

Maintenance & Aftercare Service of Your Whole House Water Filter

Like all filtration systems, the cartridges require replacement at recommended intervals to maintain performance.

Under typical Perth scheme water conditions, we generally recommend:

  • Sediment cartridge – every 6 months
  • Resin cartridge – every 12-18 months
  • Heavy Metal cartridge – every 12-18 months

To make ongoing maintenance easy, we’ll send you reminder emails when your cartridges are due for replacement, including details of which cartridges you’ll need.

If you ever have questions about your system, maintenance or replacement cartridges, our team is only a phone call or email away.

Manufacturer’s Warranty

Manufacturer’s Warranty

Unless otherwise stated, products supplied by WestOz Water Filters are covered by a 12-month manufacturer’s warranty against manufacturing defects.

This manufacturer’s warranty applies in addition to your rights under the Australian Consumer Law.

Australian Consumer Law

Our goods come with guarantees that cannot be excluded under the Australian Consumer Law. These guarantees apply in addition to any manufacturer’s warranty and may provide rights beyond the stated warranty period, depending on the nature of the product and the circumstances.

Installation Warranty

Where installation is carried out by one of our recommended installation plumbers, workmanship is covered by a separate five (5) year warranty provided by the installing plumber. Warranty claims relating to workmanship are to be directed to the installing plumber.

Why choose WestOz Water Filters?

  • Family-owned Award Winning Western Australian business  Winner badge for the Belmont BEC Business Awards 2025
  • Helping more than 1,600 Western Australian households choose practical water filtration solutions
  • Personalised recommendations based on your water supply
  • Ongoing cartridge reminder service
  • Friendly local support after installation
  • Access to trusted licensed Perth plumbers
  • Advice before and after your purchase

Need help deciding?

Not sure if this is the right system for your home?

Every household and every water supply is different. Before ordering, contact our team for personalised advice. We’ll help you determine whether this system is suitable for your home, water supply and household requirements.

FREE SHIPPING to Australian addresses on orders over $55 (AUD)

Model Whole House
Dimensions (H) 680mm x (W) 220mm x (L) 600mm
Cartridge Size 20" x 4.5"
Water Filter Cartridges

Sediment 5 μm

Resin Ionic Exchange

Heavy Metal 1 μm

Minimum pressure: 20psi
Max pressure: 70psi

Micron Rating

Sediment – 1 μm (micron)

Resin – ionic exchange to remove calcium

Heavy Metal – 1 μm (Micron)

 

Water Type Tank, Town, River, Creek, Bore
Eliminates

Sediment – dirt, dust, rust, large particles, scale

Resin – calcium, scale, PFAS

Heavy Metal – chlorine and chloramines, heavy metals such as lead, mercury, copper, nickel, and chromium

Alkalises

No

Cartridge Replacement Period Sediment 6 months; Resin and Heavy Metal 12-18 months
Certifications NSF, WQA, Water Mark
  • 3 x Big Blue 20″ Housings UV Protected
  • 1 x Stainless Steel Frame
  • 1 x Protective Stainless Steel Cover
  • 3 x Stainless Steel Pressure Gauges
  • 1 x Stage 1 filter – Sediment Filter 20″ 5 μm
  • 1 x Stage 2 filter – Resin Filter 20″
  • 1 x Stage 3 filter –  Heavy Metal Filter 20″ 1 μm
  • 1 x Spanner Wrench
Description

Perth’s hard water can take its toll on your home.

Calcium scale builds up on shower screens, taps and inside your hot water system, washing machine and dishwasher, wearing them our faster than they should.

This 3-stage system treats the water where it enters your home, so every tap in the home runs cleaner water, not just the kitchen sink.

Designed for larger households, the high-capacity 20″ cartridges provide excellent flow while helping reduce sediment, chlorine and heavy metals, as well as softening Perth hard water.

If you have bore water, it will require testing to establish correct cartridge combination.
Testing can be do through Eurofins APAL Belmont. The test result can then be viewed by us to begin the discussion on your needs.

How it Works

Water passes through three filtration stages before entering your home’s plumbing.

The high-flow design allows multiple taps to operate simultaneously without a noticeable loss of pressure in most Perth suburbs. Where unusually low or high mains pressure exists, we’ll discuss the most suitable solution during your consultation.

Whole House Water Filter Three Stages of Filtration

Stage 1 – Sediment Filter 5 μm

Reduces dirt, dust, rust and other suspended particulates, helping protect the cartridges that follow. In Perth’s water conditions, we generally recommend replacing the sediment cartridge every six months to maintain optimum performance.

Stage 2 – Water Softening Resin

Using an ion exchange process, reduces calcium hardness to help minimise scale build-up on plumbing fixtures, hot water systems and household appliances while improving the feel of the water.

Stage 3 – Chlorine Removal and Heavy Metal Reduction Cartridge 1 μm

Reduces chlorine taste and odour. Manufacturer testing reports chlorine reduction of up to 99.9% under specified test conditions.

Using an ion exchange process, reduces a range of heavy metals while conditioning the water before it is distributed throughout the home.

Installation

A licensed plumber is required for installation.

Every installation includes a bypass valve, allowing the filtration system to be isolated during maintenance without interrupting the household water supply.

Installation is not included in the listed price.

If you’re located in Perth, we can arrange installation through one of our trusted licensed plumbing partners. Contact us for an installation-inclusive quotation.

Maintenance & Aftercare Service of Your Whole House Water Filter

Like all filtration systems, the cartridges require replacement at recommended intervals to maintain performance.

Under typical Perth scheme water conditions, we generally recommend:

  • Sediment cartridge – every 6 months
  • Resin cartridge – every 12-18 months
  • Heavy Metal cartridge – every 12-18 months

To make ongoing maintenance easy, we’ll send you reminder emails when your cartridges are due for replacement, including details of which cartridges you’ll need.

If you ever have questions about your system, maintenance or replacement cartridges, our team is only a phone call or email away.

Manufacturer’s Warranty

Manufacturer’s Warranty

Unless otherwise stated, products supplied by WestOz Water Filters are covered by a 12-month manufacturer’s warranty against manufacturing defects.

This manufacturer’s warranty applies in addition to your rights under the Australian Consumer Law.

Australian Consumer Law

Our goods come with guarantees that cannot be excluded under the Australian Consumer Law. These guarantees apply in addition to any manufacturer’s warranty and may provide rights beyond the stated warranty period, depending on the nature of the product and the circumstances.

Installation Warranty

Where installation is carried out by one of our recommended installation plumbers, workmanship is covered by a separate five (5) year warranty provided by the installing plumber. Warranty claims relating to workmanship are to be directed to the installing plumber.

Why choose WestOz Water Filters?

  • Family-owned Award Winning Western Australian business  Winner badge for the Belmont BEC Business Awards 2025
  • Helping more than 1,600 Western Australian households choose practical water filtration solutions
  • Personalised recommendations based on your water supply
  • Ongoing cartridge reminder service
  • Friendly local support after installation
  • Access to trusted licensed Perth plumbers
  • Advice before and after your purchase

Need help deciding?

Not sure if this is the right system for your home?

Every household and every water supply is different. Before ordering, contact our team for personalised advice. We’ll help you determine whether this system is suitable for your home, water supply and household requirements.

FREE SHIPPING to Australian addresses on orders over $55 (AUD)

Specifications
Model Whole House
Dimensions (H) 680mm x (W) 220mm x (L) 600mm
Cartridge Size 20" x 4.5"
Water Filter Cartridges

Sediment 5 μm

Resin Ionic Exchange

Heavy Metal 1 μm

Minimum pressure: 20psi
Max pressure: 70psi

Micron Rating

Sediment – 1 μm (micron)

Resin – ionic exchange to remove calcium

Heavy Metal – 1 μm (Micron)

 

Water Type Tank, Town, River, Creek, Bore
Eliminates

Sediment – dirt, dust, rust, large particles, scale

Resin – calcium, scale, PFAS

Heavy Metal – chlorine and chloramines, heavy metals such as lead, mercury, copper, nickel, and chromium

Alkalises

No

Cartridge Replacement Period Sediment 6 months; Resin and Heavy Metal 12-18 months
Certifications NSF, WQA, Water Mark
What's Included
  • 3 x Big Blue 20″ Housings UV Protected
  • 1 x Stainless Steel Frame
  • 1 x Protective Stainless Steel Cover
  • 3 x Stainless Steel Pressure Gauges
  • 1 x Stage 1 filter – Sediment Filter 20″ 5 μm
  • 1 x Stage 2 filter – Resin Filter 20″
  • 1 x Stage 3 filter –  Heavy Metal Filter 20″ 1 μm
  • 1 x Spanner Wrench

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