Whole House Twin Water Filter 20 Inch with Bracket
  • Whole House Twin Water Filter 20 Inch with Bracket
  • Twin Whole House filter visible
  • Twin Whole House High Flow Water Filter 20 Inch with Stand and Cover LW
  • Polyspun 5
  • Aragon Plus 20 Inch
  • Caleffi Pressure Valve (1)

Whole House Twin 20″ High Flow Water Filter – Chlorine, Chemicals & Bacteria (Town & Tank Water)

Clean water should never be something you have to second-guess.

Whether your water comes from the tap or the tank, it can carry more than you’d expect: from chlorine and pesticides to bacteria, sediment, and heavy metals. These contaminants can affect the way your water smells, tastes, and feels on your skin. It’s frustrating to think that something as essential as water might be working against your efforts to live well.

If you’re looking for a reliable home water filtration system that gives you peace of mind, you’re not alone and you’re in the right place.

 

Meet our Whole House Water Filter – Twin 20″ High Flow System

This powerful whole house water filter is designed to protect every tap in your home. It combines a 1-micron Polyspun sediment filter with the advanced Aragon Plus cartridge, independently tested and made in Europe. Together, they reduce a wide range of common and emerging contaminants while maintaining a strong flow rate of up to 50 litres per minute, perfect for families and busy households.

What’s inside:

  • Polyspun Sediment Filter (1 Micron)
    Captures fine particles, dirt, and debris without reducing flow. Certified to NSF 42 and FDA CFR Title 21.
  • Aragon Plus Cartridge (>2 Microns)
  • Includes 304 stainless steel bracket, 3 stainless steel pressure gauges, and Caleffi pressure valves (Made in Italy)
  • Fully compliant with Australian Plumbing Standards – Watermark AS/NZS 3497:1998 (Certificate No. 23124)

Offers triple-action filtration: mechanical, adsorption, and ion exchange. Removes bacteria, viruses, heavy metals, chlorine, and more.

Whether you’re connected to town water, or collecting rain, river, or bore water, this system helps ensure your whole home is supplied with microbiologically safe water for drinking, cooking, bathing, and everything in between.

 

What you’re avoiding:

  • Chlorine, chloramine, pesticides, and chemical residues
  • Sediment, rust, algae, and silt that can clog pipes and irritate skin
  • Bacteria, viruses, and parasites that may enter from storage tanks or ageing infrastructure

 

What you’ll gain:

  • Fresh, filtered water throughout your entire home
  • Gentler showers and baths — ideal for sensitive skin and young children
  • Longer life for your plumbing, appliances, and hot water systems
  • Confidence knowing your water is being filtered at the source

 

 

Specifications:

Filter life: approx. 60,000 litres per cartridge (6–12 months depending on usage)

Max flow rate: 50 litres per minute

Water temperature: +4°C to +75°C

Dimensions: 385mm (W) x 700mm (H) x 205mm (D)

Warranty: 5 years

 

Specifications:

  • Filter life for the included Polyspun 1 Micron 20″ x 4.5″:  60,000 litres (6-12 months depending on water usage)
  • Filter life of the included Aragon 20″ x 4.5″ >2 Microns:  60,000 litres (6-12 months depending on water usage)
  • Dimensions: 385 (W) x 700 (H) x 205 (D)
  • Max. flow rate: 50 litres per minute
  • Water temperature: +4°C to +75°C
  • Warranty: 5 years

View replacement Polyspun Whole House Sediment Replacement Pre-Filter 20″ x 4.5″
View replacement Aragon Plus Whole House Replacement Filter 20″ x 4.5″

$979.00 – $1,439.00 inc. GST

SKU: IT003986 Categories: ,

Description

We’ve Been In Your Shoes

We’re not just another water filter shop — we’re a family who started with one filter, trying to improve our own wellbeing. With a combined experience of over 40 years, we’ve helped  thousands of customers find the right water filter system for home. Now we help others cut through the confusion, with honest advice and products we truly believe in. 

Everything You Want to Know (At a Glance)

Quick Answers

How often do I need to change the cartridges and how much do they cost?
Polyspun cartridge: Replace every 60,000 litres or 6–12 months (depending on water quality and usage). Replacement cost: $59
Aragon Plus Cartridge: Replace every 60,000 litres or every 6–12 months (depending on water quality and usage). Replacement cost: $299

Can I install this house water filter myself?
We highly recommend using a licensed plumber, as the system connects to your main water line. This ensures it’s installed safely, correctly, and in line with plumbing regulations. It’s WaterMark approved, meaning it meets Australian plumbing standards. 

What contaminants does it remove?
This home filtration system  removes sediment & particles, chemicals, heavy metals, and microbiological contaminants (bacteria, virus, cysts). Even radioactive particles like cesium and uranium. 

How do I replace the cartridge?
Simply twist open the housing, remove the old cartridge, insert the new one, and twist the housing closed. No special tools required – it’s quick and easy! 

What happens if it doesn’t work for me?
We’re here to guide you through every step, and while issues are rare, if something truly doesn’t work out, we’ll always honour our return policy on unused systems.

  • Filter life: approx. 60,000 litres per cartridge (6–12 months depending on usage)
    Max flow rate: 50 litres per minute
  • Water temperature: +4°C to +75°C
  • Dimensions: 385mm (W) x 700mm (H) x 205mm (D)
  • Warranty: 5 years
CTO MAX Filter Cartridge

Coldstream CTO Max Replacement

The system requires 2 of these cartridges to be replaced every 6-12 months for optimal performance.

You want clean, safe water for your family—and the Coldstream CTO Max helps you get there. This all-in-one cartridge removes over 130 contaminants, including Fluoride, Chlorine, Chloramine, PFAS, heavy metals, bacteria, and viruses. With its advanced dual-layer design, it fits standard benchtop water filter & undersink water filters and delivers peace of mind with every glass. Certified to NSF standards and built in the UK, it’s your powerful ally in creating a healthier home through pure, great-tasting water.

Buy Now or Learn More

Installation of your twin undersink water filter system is straightforward with the included guide and complete package of parts. All necessary fittings, tubing, and adapters are provided for a seamless setup. 

We want to ensure your installation experience is easy and stress-free. Please reach out to our support team with any questions! 

Twin Undersink Installation Instructions
Doulton Twin and Triple Undersink Water Filter Installation Diagram
Doulton Twin Under Sink Water Filter Ultracarb with fluoride removal component diagram
  • A – CTO Max Cartridge

  • B – CTO Max Cartridge

  • 1 – Housing Sump

  • 2 – Housing Cap

  • 3 – Stainless Steel Bracket

  • 4 – Pressure Limiting Valve (PLV)

  • 5 – John Guest Elbow (with red clips)

  • 6 – Brass Nipple

Certified Whole House Filtration

This system meets the WaterMark specification AS/NZS 3497:1998 Amdt 1 2001 Drinking water treatment unit – Plumbing requirements. 
Certificate Number 23124.

  • Aluminium
  • Barium
  • Cadmium
  • Chloramine
  • Chlorine
  • Chromium
  • Copper
  • Cryptosporidium & Giardia
  • Cysts
  • e. Coli Bacteria
  • Heavy Metals
  • Hydrocarbons
  • Iron
  • Lead
  • Manganese
  • Mercury
  • Nitrate
  • PCB’S
  • Potassium
  • Radium
  • Sediment, Dirt & Rust
  • Selenium
  • Sodium
  • Taste & Odour
  • Aluminium
  • Barium
  • Cadmium
  • Chloramine
  • Chlorine
  • Chromium
  • Copper
  • Cryptosporidium & Giardia
  • Cysts
  • e. Coli Bacteria
  • Heavy Metals
  • Hydrocarbons
  • Iron
  • Lead
  • Manganese
  • Mercury
  • Nitrate
  • PCB’S
  • Potassium
  • Radium
  • Sediment, Dirt & Rust
  • Selenium
  • Sodium
  • Taste & Odour
NSF Watermark certified

Replacement Filter Cartridges

Polyspun Whole House Sediment Replacement Pre-Filter 20" x 4.5"

The system requires 1 of these cartridges to be replaced every 60,000 litres or 6-12 months depending on usage and water quality

polyspun sediment filter cartridge 10 inch
Click here

Aragon-Plus Whole House Replacement Filter 20" x 4.5"

The system requires 1 of these cartridges to be replaced every 60,000 litres or 6-12 months depending on usage and water quality

Aragon 20x4.5 Inch Replacement Cartridge
Buy Here

Twin Whole House Big Blue High Flow Replacement Fllter Set

Purchase the required filters as a set for a significant discount

Twin Whole House Big Blue High Flow Replacement Filter Set
Buy Here

Advanced Filtration Stages

Our Twin Whole House High Flow Water Filter is equipped with a two-stage filtration system designed to tackle a wide range of contaminants, ensuring clean and safe water from every tap. Each stage serves a specific purpose, working together to provide exceptional water quality for your home or business.

Polyspun Pre-FIlter

First Stage - Polyspun Sediment Pre-Filter 1 Micron

This high-performance pre-filter is specially engineered without a central core, maximising its filtration capacity and flow. Its durable material resists bacterial and chemical influence, preventing the buildup of unwanted contaminants like algae. The Polyspun Sediment Pre-Filter is highly effective in capturing sediment, rust, sand, silt, and algae, safeguarding the Aragon filter and extending the life of your filtration system. Certified to NSF42 and FDA CFR Title 21.

Aragon Plus Whole House Filter

Second Stage - Aragon Plus Filter 2 Micron

Powered by patented Aragon Media and rigorously tested in certified European laboratories, this advanced cartridge is completely environmentally friendly and suitable for treating both potable and non-potable water, meeting GOST R 51871-02 and 51232-98 standards. It utilises 3 stages of filtration to effectively remove chemicals, pesticides, bacteria, heavy metals, and sediment down to >2 microns. With a high-quality extruded carbon block design, the Aragon Plus Cartridge provides outstanding purification in both hot and cold water, delivering cleaner, safer water for every use.

Aragon Tested nand Approved
Aragon 100% decontamination
Aragon Filtration Efficiency

Using Your Whole House Filter with Town Water

The Big Blue 20″ whole house water filter is an excellent choice for homes connected to municipal water supplies. Its larger 4.5″ diameter design ensures strong flow rates and minimal pressure loss, making it suitable for delivering filtered water throughout your home. This system is specifically tailored for town water, with filtration stages that effectively remove sediment, chlorine, chloramines, and other common contaminants.

Adding a bypass system is recommended for seamless water flow during filter maintenance or replacement. Designed for efficiency, the Big Blue 20″ system provides clean, great-tasting water while protecting plumbing and appliances.

Why Professional Installation Matters for Your Whole House Filter

Hiring a plumber ensures compliance with local plumbing codes, proper handling of specialised parts, prevention of common issues, warranty protection, and optimal system performance. Please note that the 5-year warranty for the whole house filter applies only when installed by a professional. A plumber can also build a bypass, allowing you to maintain water flow to your home while servicing the filter, which helps avoid disruptions. Additionally, a professional installation minimises the risk of future leaks or malfunctions, and plumbers can identify and address potential problems early, saving you time and money in the long run. This expertise ensures your filtration system functions efficiently and effectively from day one.

Essential Flexibility with a Bypass Valve in your Whole House Filtration System

A bypass valve is a must-have feature for whole house water filter systems. It gives you the flexibility to divert water around the filtration unit when needed—perfect for tasks like filling a pool, washing your car, or watering your garden. This way, you can use unfiltered water for non-essential purposes without putting extra strain on your filtration system or wasting valuable filter life. Adding a bypass valve not only makes managing your household water needs simpler but also helps maintain the performance, longevity, and overall efficiency of your filtration system.

Whole House Water Filter Bypass Diagram 4

About the Stainless Steel Option

Twin Whole House High Flow Water Filter 20 Inch with Stand and Cover LW

This option includes a durable stainless steel stand and protective cover, designed not only for enhanced durability and hygiene, but also to provide UV resistance and a sleek, professional appearance.

The stainless steel cover helps shield your filter system from everyday wear and tear, making it ideal for both indoor and outdoor installations—especially in visible areas like garages, laundry rooms, or commercial settings. It offers an added layer of protection while maintaining a clean, low-maintenance surface.

If you’re looking for a long-lasting, polished finish that blends functionality with aesthetics, the stainless steel option is a practical and stylish upgrade.

✅ Durable and corrosion-resistant
✅ UV-resistant—ideal for outdoor areas
✅ Easy to wipe clean—improved hygiene
✅ Offers added protection from knocks and dust
✅ Sleek and modern appearance—great for visible spaces
✅ Sturdy stand for secure installation

Frequently Asked Questions

What are the Benefits of a Whole House Water Filter?
  • Clean and chlorine free showers
  • Improved water quality from every tap throughout the home
  • Better tasting and smelling water
  • Healthier skin, scalp, and hair
  • Protection for plumbing and appliances
  • Less build up on shower glass
  • Cost saving over time by preventing scale buildup and protecting appliances
  • Protection against bacteria and viruses
  • Environmental benefits due to less reliance on bottled water

By tracking pressure changes, they help detect when filters become clogged or need replacement, ensuring optimal water flow and protecting plumbing and appliances from potential damage due to high pressure.

Removing fluoride requires specialised media, like activated alumina or reverse osmosis, which need extended contact time. Home water filtration systems are designed for high flow rates to supply water to multiple outlets simultaneously, which doesn’t allow for the slow, thorough process needed for fluoride removal. Including a fluoride water filter in a whole house system would significantly reduce water flow and pressure, making it impractical for whole-home use. For effective fluoride removal a point-of-use fluoride water filter is recommended. 

Yes, our Triple Whole House High Flow 20″ Filter with S/S Bracket – Sediment, Carbon & Aragon for Town Water is tested and certified to remove PFAS from water.  

Some whole house water filters with activated carbon may reduce PFAS levels to some extend and they can be coupled with a point of use PFAS water filter.  

A properly sized and installed household water filtration system should have minimal impact on your water pressure. Modern whole house water filtration systems are designed to maintain strong water flow while effectively removing contaminants. However, water pressure can decrease if filters become clogged. To maintain optimal pressure, ensure regular filter changes and choose the right size system for your home’s water usage. Our 20″ house water filter systems are specifically designed to provide excellent filtration while maintaining strong water pressure. 

When selecting the ideal location for your whole house water filter, consider the following:

Proximity to the Main Water Line: Install the filter near the main water shut-off valve, typically where the water line enters your home, to ensure it treats all incoming water.

Controlled Environment: Choose a conditioned, temperature-controlled space to prevent freezing and protect the filter from extreme temperatures, direct sunlight, and wild weather conditions (cyclones).

Accessibility: Ensure the location allows for easy maintenance and filter changes. A basement, utility room, or utility closet on the outer wall of your house can be ideal.

Safe and Secure Placement: Mount the filter on a sturdy wall or floor joist, away from electrical appliances or areas prone to water damage. If outside, secure it within a fenced area for added safety.

Installation Tips: Position the filter after the main shut-off valve but before the plumbing branches to other parts of the house. A horizontal section of pipe is ideal, but you can also use a “tee off” from a vertical pipe if necessary. Allow enough space for any pre-filters or additional components.

Space Requirements: Standard Big Blue filters may require approximately 20 inches in height, plus room for any pre-filters and clearance for maintenance. Total vertical clearance of approximately 25-26 inches is recommended.

A bypass is a plumbing feature that allows water to flow around a whole house water filter. It lets you divert water away from the filter, providing unfiltered water for maintenance, repairs, or specific tasks without interrupting the supply to your home.

Having a bypass is essential for several reasons: it simplifies filter changes, allows unfiltered water use for tasks like filling pools, and ensures access to water during emergencies if the filter fails. Overall, a bypass enhances convenience by allowing easy switching between filtered and unfiltered water while extending the life of your filter cartridges.

Data Sheets

Twin Whole House High Flow Water Filter 20" with Bracket Brochure
Aragon Plus Brochure
Polyspun Brochure

Maintenance Guides

Cartridge Replacement Guide

Additional information

Choose Your Setup:

Stainless Steel Bracket (Included), Premium Stainless Steel Stand & Cover (Upgrade)

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