SKU: 40348310287

Doulton Ultracarb Water Treatment Cartridge (To fit under sink or inline systems only)

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Description

Doulton Ultracarb Water Treatment Cartridge (To fit under sink or inline systems only)Doulton Ultracarb Replacement Filter Suitable for use with Stainless Steel Countertop System Only Replacement Doulton Supersterasyl Ceramic Filter These genuine filters are made in England and will filter absolute to 0. 9 microns. These Premium filters needs to be replaced every 2300 litres of water filtered. Higher levels of chlorine, chemical contamination, or sediment, will slightly shorten the life of the filters. Recommended for use on town, tank

Doulton Ultracarb Replacement Filter Suitable for use with Stainless Steel Countertop System Only

Replacement Doulton Supersterasyl Ceramic Filter 

These genuine filters are made in England and will filter absolute to 0.9 microns.  

These Premium filters needs to be replaced every 2300 litres of water filtered.

Higher levels of chlorine, chemical contamination, or sediment, will slightly shorten the life of the filters.

Recommended for use on town, tank or alternative water supply. 

Silver impregnated ceramic walls makes these filters superior to other ceramic filters.  

Laboratory Test results show these filters are very efficient at removing impurities such as chlorine, bacteria, amoebas, suspended solids, organic pesticides, some heavy metals, bad tastes and smells. They will remove 99.99% of Giardia and Cryptosporidium. 

Doulton Ceramic Candles and Cartridge Grades

Supersterasyl membrane: (candle and cartridge form): Used for microbiological removal. The only ceramic element in the world to meet the stringent NSF antimony and arsenic extraction test featuring:

  • >99.99% E.coli removal
  • Tested with live Cryptosporidium cyst to 100% removal far exceeding EPA three log cyst reduction requirements
  • 100% efficiency at 0.9 µm absolute (0.5 µm absolute ANSI standard)
  • > 98% efficiency at 0.2 µm
  • > 90% efficiency at 0.05 µm

Doulton's Extensive Development Laboratories are continually setting new standards in water quality throughout the world. Their commitment to quality has been demonstrated by achieving ISO 9002* certification, tested and approved by:

  • The British Standard 5750
  • The World Health Organization
  • Department of Health (Toronto, Ontario)
  • Water Research Council (London, England)
  • University of Arizona (USA)
  • Spectrum Labs (Minneapolis, USA)
  • WRC (Buckingham Shire, England)
  • National Sanitation Foundation (Standards 42 & 53, USA)
  • Hyder Labs, Cheshire England
  • Loughborough University, England
  • Thresh, Beale & Suckling Laboratories, England.
  • Clare Microbiological Laboratories, England
  • Severn Trent Laboratories, England
  • And Many Other Independent Laboratories Worldwide

* ISO, based in Switzerland, is an international agency that set standards for product manufacturing procedures and processes. Doulton is an ISO 9000 accredited company. As such, it undergoes regular audits by this authority in order to retain its accreditation. Doulton customers throughout the world, are therefore guaranteed a consistent supply of first class, quality assured products.

Over a million units sell each year in over 150 countries around the globe, where Doulton is a household name synonymous with clean, healthy drinking water.

Consider the rest then go with the best!

Doulton Filter History

You may associate the name of Royal Doulton with fine tableware and figurines, but do you know how they came to have the word "Royal" associated with their name?

As early as 1827, Henry Doulton developed a ceramic filter to remove bacteria from the contaminated Thames River, to provide safe drinking water. In 1835 Doulton made a gravity fed stoneware water system combined with the ceramic filter, for use by the royal household. By 1862 with the advancement in microbiology Doulton created micro porous ceramic filters capable of removing more than 99% of bacteria.

The tiny pores of the ceramic filter known as depth filtration, make it extremely efficient at removing particulate matter and fine sediment. The tightly packed activated carbon will remove taste, odours and unwanted impurities through a process called adsorption. The ceramic wall of this filter has been impregnated with silver ions to prevent the growth of bacteria in the filter itself and also in the stored water. (The silver is not painted on the inside of the walls like other filters and will not disperse into the filtered water or wear out in 6 months.) Since the beginning of the century Royal Doulton has been a leading name in water filtration, world renowned for high guality and reliability.

For their achievements made in water filtration, Doulton was given the right to use 'Royal' in their name in 1902.

How Activated Carbon Works to Filter Your Water

Activated carbon or AC, works by attracting and holding certain chemicals as water passes through it. AC is a highly porous material, therefore it has an extremely high surface area for contaminant adsorption.( Adsorption is the phenomenon whereby molecules adhere to a surface with which they come in contact with. When water containing soluble organic materials comes into contact with the granular activated carbon it selectively removes these materials by adsorption.)  
AC is made of tiny clusters of carbon atoms stacked upon one another. The carbon source is a variety of materials such as peanut and coconut shells or coal. the raw carbon source is slowly heated in the absence of air to produce a high carbon material. The carbon is activated by passing oxidizing gases through the material at extremely high temperatures. The activation process produces the pores that result in such a high adsorptive rate.

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Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
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SKU: 40348310287

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Alexa Young
San Leandro, US
★★★★★ 5
Soft and Comfortable Topper
I got this bamboo mattress topper for a small single bed we keep in our guest room, but I ended up testing it out myself first. The material feels soft and breathable, which is nice because that room can get a little warm in the afternoons. It adds a good amount of cushioning without making the bed too soft. After a couple of nights, my back actually felt better compared to the old mattress alone. I also appreciate that it’s machine washable, because our guest room sometimes doubles as a nap spot for my son after swim class, and spills happen. It dried pretty quickly in the dryer and kept its shape. Overall, it made the bed feel much more comfortable and fresh.
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Reviewed in the United States on November 24, 2025
T
TED
Boise, US
★★★★★ 5
Added comfort for someone working night shifts
I work odd hours, so my sleep schedule is all over the place. My mattress has always felt a bit too stiff after long shifts, so I got this topper hoping it would help me relax faster. It really changed the overall feel of the bed. The padding has a cushioned lift that makes lying down feel smoother, especially around the shoulders and lower back. Instead of feeling like I’m dropping onto a firm surface, there’s a soft layer that evens out the pressure. What surprised me most is how light the surface feels. Even after staying in one position, it never gets stuffy or heavy. The airflow makes a difference when your body is trying to wind down after work. The fitted pocket also stays tight around the mattress, so nothing shifts when I move. I can stretch out without worrying about the topper sliding off.
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Reviewed in the United States on November 24, 2025
K
Kyle
Draper, US
★★★★★ 5
Good option for softening a college apartment bed
I moved into a college apartment where the bed felt like it belonged in a dorm from years ago—flat and stiff. Instead of dealing with it, I tried this topper, and it added a cushiony layer right away. The surface feels much more forgiving when I fall onto the bed after studying or hanging out with friends. It has just enough padding to take away that board-like feeling without making the bed sag. Another thing I noticed is how breathable it is. I expected something this thick to feel warm, but it actually stays cool even if I stay on one side for a long stretch.
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Reviewed in the United States on November 19, 2025
L
Luna
Dallas, US
★★★★★ 5
Makes an older family mattress feel brand new
There’s an older mattress in my place that everyone avoids because it feels too worn in the middle. Instead of replacing it, I decided to give this topper a shot. Once it settled on the bed, it added a thick cushioned layer that helped level out the whole surface. Lying down feels smoother, and the middle no longer dips the way it used to. The fabric feels cool when you touch it, and it keeps that same feel even after staying on it for a while. I thought a thick topper might hold warmth, but this one keeps the air moving enough that the bed stays comfortable throughout the night.
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Reviewed in the United States on November 25, 2025
G
Grace
Omaha, US
★★★★★ 5
Helpful upgrade when staying between short-term housing
Laying it out was quick, and once it settled, the bed instantly felt gentler on the shoulders and hips. The padding feels thick without being bulky, and it molds just enough so that you feel supported without sinking. The airflow is surprisingly good. Even after lying still for long periods, the surface never turns warm or clammy. That was important since the mattress underneath didn’t have much ventilation.
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Reviewed in the United States on November 25, 2025

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