0.22 Micron Hydrotech Water Filter Cartridge (20” x 4.5”) for Pure₂O Whole House Water Filtration Systems
Woman holding a 0.22 Micron Hydrotech Water Filter Cartridge (20” x 4.5”) for Pure₂O Whole House Water Filtration Systems
Pure₂O Stage 3 Hydrotech carbon block filter – 20” x 4.5” 0.22-micron finishing filter designed to improve water quality, reduce limescale buildup in whole-house filtration systems.
0.22 Micron Hydrotech Water Filter Cartridge (20” x 4.5”) for Pure₂O Whole House Water Filtration Systems
Woman holding a 0.22 Micron Hydrotech Water Filter Cartridge (20” x 4.5”) for Pure₂O Whole House Water Filtration Systems
Pure₂O Stage 3 Hydrotech carbon block filter – 20” x 4.5” 0.22-micron finishing filter designed to improve water quality, reduce limescale buildup in whole-house filtration systems.

0.2 Micron Anti-Scale Carbon Block Water Filter Cartridge | 20” x 4.5” Whole House

$209.00

0.2 Micron Premium Anti-Scale Carbon Block Water Filter Cartridge | 20" x 4.5" Universal Whole House Replacement Filter

The Pure₂O 0.2 Micron Premium Water Filter Cartridge is our highest performance whole house replacement filter, combining ultra-fine carbon filtration with advanced anti-scale technology to deliver exceptional water quality throughout your home.

Designed for standard 20" x 4.5" Big Blue filter housings, this premium cartridge helps reduce chlorine, unpleasant tastes and odours, fine sediment and microscopic particles, while helping minimise the build-up of hard water scale on taps, shower screens and household appliances.

Ideal as the final stage of a whole house filtration system, it delivers cleaner, fresher water to every tap without the need for proprietary filter housings.

Key Features

  • 0.2 Micron Premium Filtration
    Captures ultra-fine particles while providing outstanding chlorine, taste and odour reduction.

  • Advanced Anti-Scale Technology
    Helps reduce the formation of hard water scale, making mineral deposits easier to clean from showers, taps, kettles and bathroom surfaces.

  • Improves Water Quality
    Produces cleaner, clearer water throughout your entire home while enhancing the overall performance of your filtration system.

  • Universal 20" x 4.5" Size
    Compatible with most standard whole house Big Blue water filter systems.

  • Premium Food-Grade Construction
    Manufactured using high-quality, BPA-free materials for reliable long-term performance.

Why Choose This Filter?

This premium cartridge is designed for households wanting more than just basic sediment and chlorine filtration. Its ultra-fine 0.2 micron carbon block provides an exceptional final stage of filtration, while the integrated anti-scale technology helps reduce mineral deposits throughout your plumbing system.

Unlike a water softener, this filter does not remove calcium from the water. Instead, it helps reduce the formation of hard mineral scale, making taps, shower screens and fixtures easier to maintain while helping reduce scale build-up inside household appliances and plumbing.

Suitable for residential and light commercial whole house water filtration systems using standard 20" x 4.5" filter housings. Replace approximately every 12 months, depending on water quality and household usage.

0.2 Micron Premium Anti-Scale Carbon Block Water Filter Cartridge | 20" x 4.5" Universal Whole House Replacement Filter

The Pure₂O 0.2 Micron Premium Water Filter Cartridge is our highest performance whole house replacement filter, combining ultra-fine carbon filtration with advanced anti-scale technology to deliver exceptional water quality throughout your home.

Designed for standard 20" x 4.5" Big Blue filter housings, this premium cartridge helps reduce chlorine, unpleasant tastes and odours, fine sediment and microscopic particles, while helping minimise the build-up of hard water scale on taps, shower screens and household appliances.

Ideal as the final stage of a whole house filtration system, it delivers cleaner, fresher water to every tap without the need for proprietary filter housings.

Key Features

  • 0.2 Micron Premium Filtration
    Captures ultra-fine particles while providing outstanding chlorine, taste and odour reduction.

  • Advanced Anti-Scale Technology
    Helps reduce the formation of hard water scale, making mineral deposits easier to clean from showers, taps, kettles and bathroom surfaces.

  • Improves Water Quality
    Produces cleaner, clearer water throughout your entire home while enhancing the overall performance of your filtration system.

  • Universal 20" x 4.5" Size
    Compatible with most standard whole house Big Blue water filter systems.

  • Premium Food-Grade Construction
    Manufactured using high-quality, BPA-free materials for reliable long-term performance.

Why Choose This Filter?

This premium cartridge is designed for households wanting more than just basic sediment and chlorine filtration. Its ultra-fine 0.2 micron carbon block provides an exceptional final stage of filtration, while the integrated anti-scale technology helps reduce mineral deposits throughout your plumbing system.

Unlike a water softener, this filter does not remove calcium from the water. Instead, it helps reduce the formation of hard mineral scale, making taps, shower screens and fixtures easier to maintain while helping reduce scale build-up inside household appliances and plumbing.

Suitable for residential and light commercial whole house water filtration systems using standard 20" x 4.5" filter housings. Replace approximately every 12 months, depending on water quality and household usage.

Specifications

  • Filter Type: High Flow Multi-Function Carbon Block (Hydrotech HFMF Series)

  • Micron Rating: 0.22 Micron (nominal)

  • Size: 20” x 4.5” (Big Blue standard)

  • Max Flow Rate: Up to 75 litres per minute

  • Chlorine Capacity: Up to 400,000 litres

  • Carbon Media: Multi-layer carbon block with scale control & heavy metal reduction media

  • Operating Pressure: Test water pressure prior to installation (pressure limiting valve recommended where required)

  • Operating Temperature: 4°C - 38°C

  • Material: Food-grade, BPA-free components

  • Compatible Housings: Standard 20” x 4.5” Big Blue housings

Where This Filter Sits in the System

  • Final polishing stage in a whole-house filtration system

  • Designed to treat chlorine, taste, odour, cysts, heavy metals, scale and fine particulates

  • High-flow design allows full-house coverage without choking pressure

  • Commonly used downstream of sediment and catalytic carbon stages

This is a finishing filter, focused on water quality, scale control, and appliance protection.

  • A 0.22 micron rating allows this filter to reduce very fine particulates including cysts, sediment, chlorine, heavy metals, scale, taste and odour contaminants. It provides a final polish to already pre-filtered water.

  • No. Despite the fine micron rating, this cartridge is engineered for high-flow applications, supporting flow rates up to 75 L/min when installed in a correctly sized Big Blue housing.

  • Yes. This cartridge is specifically designed for whole-house systems, including mains water and tank water supplies, where high flow and large capacity are required.

  • This filter is not designed as a dedicated PFAS removal cartridge. For targeted PFAS and chloramine reduction, use the premium catalytic carbon PFAS filter earlier in the system.

  • Yes. Hydrotech HFMF cartridges are suitable for both mains and rainwater tank supplies, provided the water is microbiologically safe or adequately disinfected.

When to Replace

  • Replace based on capacity or performance, whichever comes first

  • Typical service life: up to 12 months

  • Replace sooner if you notice:

    • Reduced flow rate

    • Return of taste or odour

    • Increased scale build-up

Compatibility Note

This cartridge suits all Pure₂O Whole-House Water Filtration Systems and all other standard 20” x 4.5” systems with Big Blue housings only.