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Ultra Sterasyl and Ultra Fluoride cartridges contain silver for its bacteriostatic properties. This prevents bacteria from proliferating and developing in the filters.

The ceramic of the Ultra Fluoride and Ultra Sterasyl filter elements acts as a barrier. Bacteria, like many other pollutants, are blocked and cannot pass through the tiny pores of this envelope. Only pure, drinkable water can penetrate the filters.

Details of British Berkefeld® filtration are explained on this page.

No, and that's just as well :)
The property of British Berkefled® filters is that they retain undesirable pollutants but allow minerals to pass through in ionic form, which are beneficial to health. These minerals include calcium, potassium and magnesium. Heavy metals such as aluminium, chromium, copper and cadmium are neutralised.

The analysis results for British Berkefeld® filters can be consulted on this page.

Per- and polyfluoroalkylates, often known as PFAS, represent a family of over 4,000 chemical compounds. First appearing in the mid-twentieth century, they are used in many everyday objects for their non-stick, waterproofing and heat-resistant properties.

The best known of these substances are PFOA (perfluorooctanoic acid) and PFOS (perfluorooctane sulphonate). They are found in large quantities in seafood products and in water intended for human consumption.

As well as being toxic to humans, these chemical compounds virtually never degrade once in nature, earning them the unfortunate nickname of 'eternal chemicals'.

The good news is that British Berkefeld® systems are effective at filtering out these compounds. See the PFAS analyses carried out on Ultra Sterasyl filters on the analyses page.

Absolutely! All the plastic parts used in Ultra Sterasyl or Ultra Fluoride filter cartridges are BPA-free.

Each filter has a service life of 1500 litres, so each pair has a service life of 3000 litres.

As explained on this page, NSF certification requires filters to be tested on twice their capacity, which gives a significant margin in terms of service life.

Nevertheless, to ensure optimum performance, we recommend changing the filters after 6 months to a year, depending on how they are used.

Ultra Sterasyl and Ultra Fluoride filters are made from microporous ceramic and activated carbon. Their precise formulation is covered by an industrial patent.

Microporous ceramic: acts as a barrier against undesirable agents such as bacteria, cysts and particles too large to pass through it. It also contains silver, which prevents the proliferation of bacteria (bacteriostatic action).

Active carbon: Removes chlorine and organic contaminants (such as certain pesticides from chemical pollution) and improves the taste and smell of the water.

Difference between filters:

Ultra Sterasyl: Contains a specific media to filter out heavy metals.

Ultra Fluoride: Contains a different media designed to eliminate fluorides.

These filters offer an effective solution tailored to the specific needs of water filtration.

No, Ultra Sterasyl and Ultra Floride filters do not filter the same contaminants. These two cartridges use the same technology and operate in the same way, but they do not have the same filtration performance.
For more details on their filtration capacity, see the page on our website dedicated to this subject.

It is best to completely empty the low tank after 3 days, before refilling your system. If the water is kept cool, it can remain drinkable for up to a week. This is a precautionary measure. In fact, the filtration process eliminates the chemical agents that prevent the proliferation of bacteria. In humid, temperate environments, these bacteria can develop more quickly.

Filters should be stored in their original packaging in a place free of strong odours. Filters can become impregnated with ambient odours due to the presence of activated carbon.

In principle, British Berkefeld® purification elements do not have a limited shelf life.

The NSF is an independent, non-profit organisation specialising in the development of standards, inspection, testing and certification of products related to public health and safety.

Good news, Ultra Sterasyl filters are NSF 42, NSF 53 and NSF 372 certified:

NSF / ANSI 42: Reduction of organoleptic contaminants (taste, odour, chlorine, etc.).
NSF / ANSI 53: Reduction of contaminants with health effects (lead, PFAS, Cryptosporidium, etc.).
NSF / ANSI 372: Absence of lead

Find the certification of our filters on the NSF website.

Following the manufacturer's advice, it is recommended that you clean your system once a month.

Filters - Never use a cleaning product on the filters. Remove the filters and scrub them with a scrubbing sponge under a trickle of cold water. Never boil your filters. Once cleaned, reinstall them, fill the top tank and allow some water to drain out before consuming.

Tanks - No aggressive or corrosive products should be used to clean the tanks, we recommend cleaning them with a mixture of household vinegar and lukewarm water. Filters should never come into contact with cleaning products, and it is advisable to remove them before cleaning your tanks to avoid any accidental splashes.

Always rinse your tanks thoroughly with clean water after cleaning.

Caution: never steam or boil your tanks.