Ultra Sterasyl(R) is Doulton's bestselling ceramic water filter for gravity water filter systems.

The combination of a microfilter ceramic outer, granular activated carbon and heavy metal removal media effectively reduces a range of different contaminants including bacteria, trace organics, enhanced organics, pharmaceuticals and heavy metals such as lead. And as well as working with our gravity water filters, it's also compatible with all other gravity fed water filter systems on the market.

Change your ceramic water filter candle every six months for consistently clear, tasty and odourless water. If you live in a cloudy water area, you can also clean the Ultra Sterasyl(R) filter to help restore its flow.

• Replacement ceramic water filter cartridge, complete with wing nuts & washers
• Improves taste and odour
• Reduces bacteria, heavy metals, trace organics, enhanced organics, pharmaceuticals and PFAS
• 99.9% reduction of microplastics*
• Filters are suitable for use in Berkey, Phoenix, Purewell, Newton Gravity Water Filter Systems
• The Ultra Sterasyl(R) ceramic filter replaces the ATC Super Sterasyl ceramic filter
• Replace every six months for best results

(*As tested and Certified by NSF to NSF/ANSI Std 401)

PLEASE NOTE: It is not recommended to combine Ultra Sterasyl and Ultra Fluoride filters together in your gravity system, as this will affect the performance of the filters.

Size: 7" (177mm) long x 49mm diameter.

Filter capacity: 1,500 litres

Removes:

• PFAS > 99.38%

• Micro Plastics > 99.99%

• Pathogenic Bacteria > 99.99%

• Cysts (Cryptosporidium, Giardia) > 99.99%

• Pharmaceuticals > 99.5%

• Lead removal > 99.5%

• Range of Pesticides > 95%

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 oxidising gases through the material at extremely high temperatures. The activation process produces the pores that result in such a high adsorptive rate.