CTO Max Twin Under Sink Water Filter – Chlorine & Fluoride Removal with Alkaliser
Feel confident about every glass you pour – now with natural minerals and a healthy pH boost.
Whether you’re caring for your family or simply looking after yourself, you want to feel good about the water you drink every day. But with tap water containing fluoride, chlorine, PFAS, microplastics, and heavy metals, it’s hard to trust what’s coming out of the tap – even when it looks clear.
You’ve done your research. You care about what goes into your body and your home. But you’re tired of second-guessing your water and you shouldn’t need a chemistry degree to feel confident about every sip.
That’s why we created the CTO Max Twin Undersink System with Alkaliser – a powerful, low-maintenance water filter that not only removes harmful contaminants but also adds beneficial minerals and gently raises the pH to deliver clean, mineral-rich, great-tasting water from your kitchen tap.
Because clean water should do more than just remove toxins – it should support your wellbeing.
Meet the CTO Max Twin with Alkaliser – clean, mineral-rich water at your fingertips
Designed for health-conscious homes, this compact undersink system combines advanced contaminant removal with natural remineralisation and alkalisation – for water that tastes better and feels better in your body.
- Dual-stage UK-made carbon block filters target fluoride, chlorine, chloramine, PFAS, microplastics, heavy metals, and organic contaminants.
- The mineralising cartridge adds additional calcium, magnesium, and other beneficial minerals while gently raising the pH of your water.
- Certified to NSF / ANSI 53 & NSF / ANSI 42 standards so you know it works.
- Hand-built in Sydney, backed by a 5-year housing warranty, and fully compliant with AS/NZS 3497:1998.
- DIY-friendly installation – fit it yourself with basic tools or ask your plumber. Either way, it’s simple.
Because clean, nourishing water should be part of your everyday life – not something you have to think twice about.
3 Simple Steps to Safer, Healthier Water
1. Choose Your Filter – Order the CTO Max Twin with Alkaliser and become part of our Pure Water Tribe.
2. We Build & Send – Each unit is assembled in Sydney and shipped with care.
3. Install & Enjoy – Fit it yourself or have a plumber install it. Enjoy clean, balanced, great-tasting water from your tap.
What You’re Avoiding
- Unwanted chemicals like PFAS, chlorine, and heavy metals
- Acidic or flat-tasting water that doesn’t support your wellbeing
- Bottled water waste and countertop clutter
What You’ll Gain
- Clean, toxin-free water that’s naturally mineralised and alkalised
- Confidence that your water supports your health and lifestyle
- A beautiful balance of purity and nourishment
- Peace of mind knowing you’ve chosen a smart, sustainable solution
You’re not just filtering water. You’re elevating your wellbeing, one glass at a time.
Take Control, Trust Your Water
Buy the CTO Max Twin Undersink Water Filter with Alkaliser today and enjoy clean, revitalising water every time you turn on the tap.
$459.00 – $519.00 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 43 (H) x 13(D)
- Cartridge sizes: 9″ x 2.5″
- Maximum flow rate: 2.5 litres per minute
- Warranty: 5 years (housing)
Filter Cartridges
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.
Choose the Right Cartridge for You
This system requires one of these cartridges to be replaced every 2 years to maintain optimal performance.
Both the AlkaHydrate (made in Asia) and the Omnipure (made in the USA) cartridges deliver excellent results – the choice comes down to your personal preference.
Also compatible with our reverse osmosis systems, both remineralisers pair beautifully with the CTO Max Twin when alkalisation is desired. They gently raise the pH and add beneficial minerals like calcium and magnesium – ideal for those who enjoy a smoother, more balanced drinking experience.
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.
- Aluminium
- Barium
- Cadmium
- Chloramine
- Chlorine
- Chromium
- Copper
- Cryptosporidium & Giardia
- Cysts
- e. Coli Bacteria
- Fluoride
- Heavy Metals
- Hydrocarbons
- Iron
- Lead
- Manganese
- Mercury
- Microplastic
- Nitrate
- PCB’S
- PFAS
- Potassium
- Radium
- Sediment, Dirt & Rust
- Selenium
- Sodium
- Aluminium
- Barium
- Cadmium
- Chloramine
- Chlorine
- Chromium
- Copper
- Cryptosporidium & Giardia
- Cysts
- e. Coli Bacteria
- Fluoride
- Heavy Metals
- Hydrocarbons
- Iron
- Lead
- Manganese
- Mercury
- Microplastic
- 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 feature a chrome finish and 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
Data Sheets & Test Reports
Additional information
| Weight | 2.5 kg |
|---|---|
| Dimensions | 36 × 36 × 15 cm |
| Alkaliser | AlkaHydrate (made in Asia), Omnipure (Made in USA) |
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