CTO Max Twin Under Sink Water Filter with Chlorine & Fluoride Removal
Feel confident about every glass you pour.
When you’re committed to clean living, every detail matters — especially your drinking water.
That’s why we’ve created the CTO Max Twin Undersink System — a powerful, low-maintenance solution that fits neatly under your kitchen bench and delivers great-tasting water on demand.
Handbuilt in Sydney and powered by UK-made carbon block cartridges, this system removes chlorine, PFAS, microplastics, and heavy metals — so you can fill your glass with confidence. No countertop clutter. No fuss. Just simple, effective filtration backed by NSF certification and a 5-year housing warranty.
Because clean living should be empowering — not overwhelming.
Why choose the CTO Max Twin?
- Dual Toxin Removal: Two specialised cartridges work together to reduce fluoride and other contaminants more effectively than standard systems.
- High-Performance CTO Filtration: Removes chlorine, chloramine, fluoride, PFAS, microplastics and organic contaminants – for pure water you’ll actually love to drink.
- NSF / ANSI 53 & NSF/ANSI 42 certified cartridges from trusted UK manufacturer Coldstream
- Handbuilt in Sydney with 5-year warranty on housing
- Simple DIY-Friendly Setup. Just basic tools required and comes with clear instructions – no fuss, no plumber needed (unless you’d prefer one!). Fully compliant with WaterMark specification AS/NZS 3497:1998
Replacement filter details can be found here.
$449.00 – $469.00 inc. GST
Description
Specifications
- Filter output up to 10,000 litres, for optimal performance we recommend replacing the filters every 6-12 months
- 0.9 Micron absolute
- Dimensions: 23(W) x 32 (H) x 13(D)
- Maximum flow rate: 2.5 litres per minute
- Warranty: 5 years (housing)
Filter Cartridges
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.
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!
Installation Diagram
Filter Componants
- 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 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
- Nitrate
- 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
- Nitrate
- PCB’S
- PFAS
- Potassium
- Radium
- Sediment, Dirt & Rust
- Selenium
- Sodium
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.
Spring Loaded with Long Reach
Standard Spring Loaded faucet with black lever, in a long reach design.
200mm W x 210mm H
Mode
Standard Mode faucet in a high loop design.
150mm W x 290mm H
Retro
Standard Retro faucet in a high loop design and long reach.
125mm W x 235mm H
Euro with Long Reach
Standard Euro faucet in a long reach design.
150mm W x 230mm H
Euro with High Loop
Standard Euro faucet in a high loop design.
150mm W x 230mm H
Metro
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
Fin
Standard Fin faucet in a long reach design.
135mm W x 250mm 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
New Nova 3-Way Mixer Tap Polished Chrome
The New Nova 3-Way Mixer Tap Polished Chrome features a sleek long-reach design, providing hot, cold and filtered water from a single tap.
200mm W x 210mm H
Data Sheets & Test Reports
Additional information
| Weight | 2 kg |
|---|---|
| Dimensions | 33 × 32 × 13 cm |
| Choose Size: | 9 Inch, 10 Inch |
3 reviews for CTO Max Twin Under Sink Water Filter with Chlorine & Fluoride Removal
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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 –
.