CTO Max Twin Under Sink Water Filter – Maximum Fluoride Shield

(11 customer reviews)

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
  • Certified to NSF/ANSI 53NSF/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.

$469.00 inc GST

Choose Your Filter Options

Your under sink water filter includes everything you need to get it installed and deliver clean water with convenience.

(Optional) 3 Way Mixer Upgrade

Replaces existing mixer tap. No extra drilling required.
View taps.

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.

Customer Reviews

(11 customer reviews)
  • Charlotte H.April 10, 2026

    Fantastic quality water. You can really taste the difference the ceramic stage makes in getting rid of any lingering odours. Very happy customer and fast delivery.

  • NoahOctober 25, 2025

    Absolutely love it. The 3-way tap was worth every cent, and knowing the kids are not drinking heavily chlorinated water is a massive win.

  • Isabella MartinezJune 8, 2025

    I was a bit skeptical about how much difference a proper 2-stage system would make compared to our old filter jug, but it is night and day. The flow rate is surprisingly fast for something filtering down so fine.

  • Oliver W.February 14, 2025

    Solid bit of gear. It feels very well constructed, and changing the two cartridges looks like it will be a breeze when the time comes next year.

  • MiaNovember 30, 2024

    No more buying plastic bottles! The water straight from this tap is better than anything you can buy at the shops.

  • Ryan PetersonSeptember 18, 2024

    Ripper of a system. The twin housings fit neatly underneath the sink and do not take up all the room where the rubbish bin usually goes. High quality fittings too.

  • Jack C.June 5, 2024

    Our town water used to taste like a swimming pool, but now it is perfectly crisp. That carbon block filter does exactly what it promises.

  • EmmaMarch 22, 2024

    Went with the dedicated filtered tap. Looks very sleek on the sink. Highly recommend.

  • Michael LawsonDecember 11, 2023

    I did a lot of homework before buying. The fact this is NSF 53 and 42 certified gave me complete peace of mind. The CTO Mac ceramic cartridge in the second stage really polishes the water. Installation was straightforward enough for a weekend DIY project.

  • Sophie T.October 2, 2023

    The main reason we chose this unit was the Omnipure fluoride filter in the first stage. It is surprisingly hard to find good under-sink systems that actually target fluoride effectively. Tastes fantastic.

  • LiamJuly 15, 2023

    Got the 3-way mixer option so we didn’t have to drill another hole in the bench. Works an absolute treat and keeps the kitchen looking neat.

2 stage under sink water filter installed

Replacement Filter Schedule

US manufactured Omnipure fluoride filter cartridges and the UK Manufactured CTO Max ceramic filter cartridge are made from NSF certified components.

Every 6-12 months

Omnipure Fluoride Filter

$44.00

Every 6-12 months

CTO Max Ceramic Filter 

$89.00

Under Sink Water Filter Installation

Specifications

  • Warranty: 5 years (housing)
  • Temperature Range: 5°C – 38°C
  • Dimensions: 23cm(W) x 34cm (H) x 13cm(D)
  • Cartridge sizes: 10″ x 2.5″
  • Filter life Omnipure Fluoride: 6-12 months or 1,892 litres
  • Filter life CTO Max: 6-12 months, or 10,000 litres
  • 0.9 Micron absolute
  • Maximum flow rate: 2.5 litres per minute
2 stage under sink water filter dimensions diagram

Designed for quick, hassle-free setup. Any qualified plumber can easily install this system in 1 hour or less, barring any unusual under-sink complications. See the diagram below for how the lines connect to your chosen tap configuration.

Dedicated Tap

2 stage under sink water filter installation diagram dedicated filtered water tap

3 Way Mixer Tap

2 stage under sink water filter installation diagram 3 way mixer tap
2 stage under sink water filter installed kitchen

Ready to order?

Your under sink water filter comes with everything included and ready to be installed for immediate use.

Filtered Water Taps

Your system includes a dedicated filtered water tap. If you prefer to avoid drilling an extra hole, you can choose one of our 3-way mixer upgrades.
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.

Dedicated Filtered Water Taps

Enhance your kitchen with the ‘Retro’ – a sleek, standard filter faucet designed to pair perfectly with your under-sink water filtration system

125mm (W) x 235mm (H)

The Metro with High Loop Faucet with bright chrome finish is designed to pair perfectly with your under-sink water filtration system.

160mm (W) x 250mm (H)

Brushed chrome finish, this elegant fixture is designed to seamlessly integrate with your chosen under sink water filtration system. 

180mm (W) x 300mm (H)

The Euro with Long Reach Faucet with bright chrome finish is designed to pair perfectly with your under-sink water filtration system.

150mm (W) x 230mm (H)

3 Way Mixer Taps

Sleek and modern with a ong reach. It’s the perfect companion for your chosen under-sink water filtration system.

240mm (W) x 360mm (H)

The Side Lever High Loop 3-Way Mixer in Chrome features a sleek  design, providing hot, cold, and filtered water from a single tap.

203mm (W) x 365mm (H)

The Stainless Steel Premier 3-Way Mixer Tap features a matte black finish, providing hot, cold, and filtered water from a single tap.

210mm (W) x 290mm (H)

The Stainless Steel 3 Way High Loop Matte Black Mixer Tap features a high loop design in a matte black finish.

225mm (W) x 400mm (H)

Ready to order?

Your under sink water filter comes with everything included and ready to be installed for immediate use.