CTO Max Twin Under Sink Water Filter – Maximum Fluoride Shield
Price range: $449.00 through $469.00 inc. GST
Clean water shouldn’t be complicated. This Twin Undersink Water Filter uses two cartridges working together to reduce fluoride and common contaminants.
- US-made Omnipure Fluoride Filter – reduces fluoride by up to 97%
- 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
- Incl. UK-made CTO Max ceramic & carbon block filter reducing fluoride up to 88.9%, and chlorine, chloramine, PFAS, microplastics, heavy metals, 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 months or 10,000 litres.
Description
Specifications
- Filter life 6 months
- 0.9 Micron absolute
- Maximum flow rate: 2.5 litres per minute
- Warranty: 5 years (housing)
- Temperature Range: 5°C – 70°C
- Dimensions: 23(W) x 32 (H) x 13(D)
- Cartridge sizes: 9″ x 2.5″ (blue caps), 10″ x 2.5″ (red caps)
- Watermark Certificate Number: 23124
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
- Potassium
- Radium
- Sediment, Dirt & Rust
- Selenium
- Sodium
- 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
- Potassium
- Radium
- Sediment, Dirt & Rust
- Selenium
- Sodium
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?
Omnipure Fluoride Removal Cartridge XF834/XF934: Every 6 months ($95).
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 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 Maximum 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.
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 – Omnipure Fluoride Cartridge XF834/XF934
- 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 |
| Choose Size: | 9 Inch, 10 Inch |
4 reviews for CTO Max Twin Under Sink Water Filter – Maximum Fluoride Shield
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Elsie Field –
I was a bit nervous about installing the CTO twin undersink system but it turned out to be much easier than I expected! Everything fit perfectly under the sink and now I absolutely love the taste of the water. It’s so fresh and clean and gives me peace knowing fluoride and other nasties are being filtered out. Highly recommend!
Living Whole –
Thank you for your review, Elsie. We’re happy to hear you found the installation easier than expected and you’re enjoying your tap water now.:)
Kirra Lee Parr –
Easy installation, very helpful if you call to chat with them. Delicious tasting water.
Living Whole –
Thanks for the review Kirra Lee. The Doulton twin is an excellent under sink water filter and we’re glad to be able to help.
Ian –
I recommend this product for clean safe water
Living Whole –
Hi Ian, Thank you for your feedback. 🙂
Ben –
.