CTO Max Twin Under Sink Water Filter – Sediment & Fluoride Shield
$369.00 inc. GST
Designed specifically for Australian homes battling heavy sediment and contaminants, this twin system protects you from dirt and rust while serving as one of the most effective water filters that remove fluoride, heavy metals, and toxic chemicals.
- High-capacity Polyspun Sediment Pre-Filter to act as a physical barrier against dirt, rust, sand, silt, and algae.
- UK-made CTO Max ceramic & carbon block filter – works alongside the Omnipure filter to reduce fluoride by up to 88.9%, plus chlorine, chloramine, PFAS, microplastics, heavy metals and bacteria
- Certified to NSF/ANSI 53 & NSF/ANSI 42 standards.
- Hand-built in Sydney, backed by a 5-year housing warranty, and fully compliant with Watermark standard AS/NZS 3497:1998.
- DIY-friendly setup – install this under sink filter with basic tools, or have a plumber do it for you. It’s simple either way.
- Replace filters every 6-12 months or 10,000 litres.
Description
Specifications
- Filter life CTO MAX: 6 months or 10,000 litres
- Filter life Polyspun: 12 months, depending on water quality
- 0.9 Micron absolute
- Maximum flow rate: 2.5 litres per minute
- Warranty: 5 years (housing)
- Temperature Range: 5°C – 38°C
- Dimensions: 23(W) x 34 (H) x 13(D)
- Watermark Certificate Number: 23124
This unit includes a heavy-duty sediment pre-filter for difficult water conditions. If your water is generally clear (no rust or dirt), the standard CTO Max Twin Under Sink Water Filter – Maximum Fluoride Shield or Chemical & Lead Guard is your best choice
Certified Under Sink Water Filtration
This system meets the WaterMark specification AS/NZS 3497:1998 Amdt 1 2001 Drinking water treatment unit – Plumbing requirements.
Certificate Number 23124.
- Fluoride
- Aluminium
- Barium
- Cadmium
- Chloramine
- Chlorine
- Chromium
- Copper
- Cryptosporidium & Giardia
- Cysts
- e. Coli Bacteria
- Heavy Metals
- Hydrocarbons
- Iron
- Lead
- Manganese
- Mercury
- Microplastics
- PCB’S
- PFAS
- Radium
- Sediment, Dirt & Rust
- Selenium
- Fluoride
- Aluminium
- Barium
- Cadmium
- Chloramine
- Chlorine
- Chromium
- Copper
- Cryptosporidium & Giardia
- Cysts
- e. Coli Bacteria
- Heavy Metals
- Hydrocarbons
- Iron
- Lead
- Manganese
- Mercury
- Microplastics
- PCB’S
- PFAS
- Radium
- Sediment, Dirt & Rust
- Selenium
Everything You Want to Know
What's included in the system?
The system comes complete with the first set of filters, housing, hoses, screws, locking clips, and all components required for installation (excluding tools).
How often do I need to change the cartridges and how much do they cost?
Polyspun Pre-Filter: Every 12 months depending on water quality ($18).
Coldstream CTO Max cartridge: Every 6 months ($120 – discounted twin set available).
Can I install this under sink filter myself?
Yes, you can install this undersink water purifier yourself if you have basic plumbing skills. It’s WaterMark approved, meaning it meets Australian plumbing standards. If you prefer, your local licensed plumber can install it for you as well.
What contaminants does it remove?
This system removes dirt, rust, sand, silt, and algae & over 130 chemicals and contaminants incl. chlorine, chloramine, fluoride, herbicides & pesticides, bacteria, virus, PFAS, microplastics, heavy metals.
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 are required — and a filter wrench is included to make the process even easier. It’s quick and straightforward.
Replacement Filter Cartridges for
CTO Max Twin Under Sink Water Filter with Sediment & Fluoride Shield
The system requires 1 of these cartridges to be replaced every 6 months or 1892 litres, dependent on water quality.
The system requires 1 of these cartridges to be replaced every 6 months or 10,000 litres, dependent on water quality.
1st Stage of Filtration: Polyspun Pre-Filter Cartridge
Safeguard your filtration system against the heavy particulate matter common in Western Australia, the Northern Territory, and South Australia. Our commercial-grade 1-Micron Polyspun Pre-Filter acts as a robust first line of defence, physically trapping mud, rust, sand, and algae before they reach your premium filters. By preventing premature clogging, this cartridge is the essential first stage of an effective water filter for sediment, ensuring crystal-clear flow and significantly extending the lifespan of your advanced CTO Max Fluoride cartridge for consistent protection.
2nd Stage of Filtration: Coldstream CTO Max - Made in UK
Remove Fluoride and Chlorine with only one cartridge! The KLT Coldstream CTO MAX water filter is an All-in-One filter removing over 130 Chemicals incl. Chlorine, Chloramine, and Fluoride, along with Bacteria, Virus, PFAS, Microplastics, Heavy Metals. Suitable for our Benchtop and Undersink water filter systems, it features a unique design that utilises a two-part construction: Outer ceramic layer with antimicrobial properties and Inner carbon core for chemical contaminant protection.
Tested and certified to NSF/ANSI 42 and NSF / ANSI 53 for Chemicals, PFAS, Microplastics.
3 Simple Steps to Safer Water — with Free Shipping Australia-Wide:
Join our Pure Water Tribe – Choose your custom water filter system and become part of a community that values clean, safe water.
Crafted for you in Sydney – Our team hand-builds your water filter to order and ships it with tracking, so you know its on its way.
Install your water filter simply, turn on your tap and feel at home with others who trust what they drink.
How We Got Here And Why It Matters
We’re a family business built on firsthand experience and a genuine commitment to better wellbeing through clean water. With over 40 years of combined expertise and nearly a decade in business, we’ve helped thousands of families choose the right water filter system. We offer clear, honest advice and products we truly stand behind—and use ourselves.
Choose Your Under Sink Water Filter Tap
All our under sink water filter taps include a base plate and connection fittings.
* Please Note: the width (W) refers to the dimension from the centre line of the tap body to the centre of the spout.
Retro with High Loop
Standard Retro faucet in a high loop design and long reach.
125mm W x 235mm H
Metro with High Loop
Standard Metro faucet in a high loop design.
160mm W x 250mm H
Antique
Standard Antique faucet in a high loop design.
125mm W x 235mm H
Euro with Long Reach
Standard Euro faucet in a long reach design.
150mm W x 230mm H
Side Lever High Loop 3-Way Mixer Chrome
The Side Lever High Loop 3-Way Mixer Tap in Chrome features a sleek high-loop design, providing hot, cold, and filtered water from a single tap.
203mm W x 365mm H
Side Lever Long Reach 3-Way Mixer Chrome
The Side Lever Long Reach Mixer Tap features a simple yet elegant design, providing hot, cold, and filtered water from a single tap.
195mm W x 325mm H
3-Way Mixer Tap Standard Chrome
The 3-Way Mixer Tap Standard Chrome comes in a sleek long-reach design, providing hot, cold, and filtered water from a single tap.
245mm W x 180mm H
Stainless Steel 3 Way High Loop Matte Black Mixer Tap
The Stainless Steel 3 Way Mixer Tap features a high loop design in a matte black finish, providing hot, cold and filtered water from a single tap.
225mm W x 400mm H
Component Diagram
- A – Polysun Pre-Filter
- B – Coldstream 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
Hassle-Free Installation
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!
Data Sheets & Test Reports
Additional information
| Weight | 2 kg |
|---|---|
| Dimensions | 33 × 32 × 13 cm |
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