• Doulton Twin Under Sink Water Filter with fluoride removal

Doulton Twin Under Sink Water Filter with Fluoride Removal

  • Removes up to 99.9% PFAS, fluoride, chlorine, chemicals, pesticides, heavy metals, particulates, and bacteria
  • Retains all beneficial minerals
  • Enhances taste/odour
  • Perfect for town water
  • Filter life of the included Doulton Ultracarb: 4,000 litres, scrub clean for extended filter life
  • Filter life of the included Fluoride filter: 1,800 litres
  • Filters made in UK and USA
  • Handbuilt in Australia from high-quality materials that are designed to last
  • 5 year warranty
  • Easy to maintain with replacement filters readily available and fitted quickly
  • NSF certified (ANSI 61)
  • Meets WaterMark specification AS/NZS 3497:1998

The Doulton Twin under sink water filter provides a high-quality, affordable option for water filtration for both the home and office. This under counter water filter system is designed for excellent water purification, convenient installation and use.

The first stage is fluoride water filtration that selectively adsorb fluoride ions, helping reduce concerning levels of fluoride often present in town and city water supplies.

The second stage of filtration is a 0.5 micron Ultracarb® carbon block filter that polishes the water by removing organic chemicals, chlorine taste and odor, particulates, and microorganisms.

With its simplified dual-filter process, our Doulton® Twin Undersink filter with fluoride removal delivers cost-effective and highly effective filtration in a discreet, space-saving setup.

  • Dual stage filtration process combines fluoride removal followed by organic chemical and particulate reduction.
  • Compact housing fits discreetly under the sink, keeping counters clutter-free.
  • System connects to a separate chrome faucet installed beside your existing sink fixture for easy filtered water access.


  • Filter output 5,000 litres
  • Maximum flow rate: 3 litres per minute
  • Dimensions: 23(W) x 32 (H) x 13(D)
  • Micron Rating: 0.5 micron nominal, 0.9 micron absolute
  • Warranty: 5 years
  • We recommend that the filter cartridge be replaced every 6-12 months depending on water quality and usage.
NSF Watermark certified
NSF Watermark certified


Replacement filter details can be found here.

Choose the tap for your under sink water filter

Retro with High Loop Spring Loaded Black Lever Chrome +$16.00 Metro with High Loop Chrome +$19.00 Antique with High Loop +$19.00 Fin with Long Reach +$24.00 Mode with high Loop +$36.00 Euro with High Loop +$56.00 Euro with Long Reach +$56.00

$399.00 inc. GST

SKU: IT4186 Category:


1st Stage of Filtration: Fluoride Reduction - Made in USA

The first filtration stage in the Doulton under sink system uses a specialised fluoride removal cartridge containing a high-purity aluminum oxide media.

This adsorbent filter media is made from the same crystalline mineral corundum that rubies and sapphires consist of. Through a selective adsorption process, fluoride ions chemically bond to the media’s oxidized surface sites as water passes through.

With an extremely porous structure, the media provides an abundant 200 square meters of adsorption surface area per gram. This maximizes contact between the passing water and the media, allowing for thorough fluoride removal.

The high-purity corundum media, with its vast adsorptive surface area and selective binding affinity for fluoride, enables robust stage one fluoride reduction within the Doulton system.

2nd Stage of Filtration: Doulton Ultracarb - Made in UK

The second filtration stage in the Doulton undersink system utilizes the Ultracarb® cartridge, which combines mechanical and adsorptive filtration:

Outer Ceramic Shell:

  • Manufactured from Doulton’s Sterasyl® ceramic with submicron pores that mechanically filter out particulates, bacteria, cysts, and turbidity.
  • Incorporates trace silver for bacteriostatic properties to inhibit microbial growth.

Inner Carbon Block Core:

  • Made from dense, extruded NSF-tested coconut shell carbon that adsorbs chlorine, chloramines, tastes/odors, chemicals, pesticides, and heavy metals.
  • Achieves NSF certification for reduction of chlorine/taste/odor and emerging contaminants.

The dual-action mechanical and adsorptive filtration of the Ultracarb® cartridge provides robust stage two polishing to produce clean, great-tasting water.

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.

WaterMark Certification
NSF Certification

Replacement Filter Cartridges for
Doulton Twin Under Sink Water Filter with Fluoride Removal

Fluoride Filter Replacement

The system requires 1 of these cartridges to be replaced every 1800 litres or 12 months depending on water quality

Doulton Ultracarb Water Filter

The system requires 1 of these cartridges to be replaced every 5000 litres or 12 months depending on water quality.

Twin Under Sink Fluoride Removal Replacement Filter Set

Purchase the required filters as a set for a significant discount.

Doulton Twin Under Sink Water Filter Ultracarb with fluoride removal component diagram

Doulton Twin Under Sink Water Filter with Fluoride Removal Components

  • A – Fluoride filter cartridge
  • B – Doulton Ultracarb Filter 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

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.

Chrome Spring Loaded Faucet with Black Lever

Spring Loaded with Long Reach

Standard Spring Loaded faucet with black lever, in a long reach design.

200mm W x 210mm H

Chrome Mode Faucet with High Loop


Standard Mode faucet in a high loop design.

150mm W x 290mm H

Chrome Retro Faucet with High Loop and Long Reach


Standard Retro faucet in a high loop design and long reach.

125mm W x 235mm H

Chrome Euro Faucet with Long Reach

Euro with Long Reach

Standard Euro faucet in a long reach design.

150mm W x 230mm H

Chrome Euro Faucet with High Loop

Euro with High Loop

Standard Euro faucet in a high loop design.

150mm W x 230mm H

Chrome Metro Faucet with High Loop


Standard Metro faucet in a high loop design.

160mm W x 250mm H

Chrome Antique Faucet with High Loop


Standard Antique faucet in a high loop design.

125mm W x 235mm H

Chrome Fin Faucet with Long Reach


Standard Fin faucet in a long reach design.

135mm W x 250mm H

Pure Water with Dulton's Ultracarb and Omnipure Fluoride Filter

Omnipure Fluoride Removal Cartridge

The Omnipure Fluoride Filter with fine-mesh Activated Alumina - 1st Stage

The Omnipure Fluoride Cartridge uses Activated Alumina to reduce fluoride by 99%. Through selective adsorption, fluoride ions bind to the cartridge’s oxidised surface, removing them from your water supply. This advanced filtration media ensures your drinking water is virtually fluoride-free. 

Doulton Fluoride Removal Cartridge Test Result
Doulton Ultracarb Water Filter - 9 Inch
Doulton Ultracarb Filter

The Doulton® Ultracarb's three-stage filtration process to purify water - 2nd Stage

Outer Ceramic Shell:

  • Manufactured from proprietary Sterasyl® ceramic material with submicron pores that mechanically trap particulates, sediment, bacteria, cysts, and turbidity through size exclusion.
  • Incorporates trace levels of silver that act as a bacteriostatic agent to inhibit bacterial growth within the shell.

Inner Filtration Core:

  • Contains highly adsorbent, activated carbon made from NSF-certified coconut shells to reduce chlorine, organic compounds, and improve taste/odor.
  • Also includes ion exchange resin beads designed to attract, bind, and remove dissolved heavy metals like lead and zinc.

Ion Exchange Resin: 

  • Heavy metal removal media for the reduction of lead and other heavy metals.

By combining filtration in the outer shell with filtration in the inner core, this candle filter provides extensive removal of particulates, pathogens, chlorine, organics, and heavy metals for optimized water quality and safety.

Scrub Clean and Reuse

The Doulton Ultracarb® filter cartridge can be washed and reused

If the flow rate slows, simply scrub clean under cold, running water with a clean sponge or brush.

What does the Doulton® Ultracarb Ceramic Cartridge remove?

  • Bacteria (Cholera, Typhoid, Salmonella, Serratia, E Coli, fecal coliform)
  • Chlorine
  • Cysts (Cryptosporidium, Giardia Lamblia)
  • Chemicals
  • Sediment
  • Heavy Metals (Lead and other Heavy Metals)
  • PFOA and PFOS
  • Pesticides, Herbicides, and Solvents
  • Taste and Colour
Doulton Ultracarb Chlorine & Lead Reduction
Doulton Ultracarb Filtration Efficiency

Additional information

Weight2 kg
Dimensions33 × 32 × 13 cm


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