Duo Active PFAS
- Easy to install
- Clean water instantly
- 10-year warranty on the stainless steel housing
Pairs perfectly with this
Balance Shower Filterfrom CHF 118.90
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with Protect CHF 178.80
Duo Active PFAS
Pollutant filter for the tap
The Alb Filter Duo Active PFAS tap filter is the optimised further development of the proven Duo Active system – specially developed for effective protection against PFAS (per- and polyfluoroalkyl substances), the so-called forever chemicals, directly at the tap.
The practical diverter lever lets you switch quickly between filtered and unfiltered water. This keeps the full mains pressure for washing up and saves cartridge capacity – good for the environment and your wallet.
The Duo filter housing
Made of high-quality V4A stainless steel
The robust and durable stainless steel housing is free of harmful substances, corrosion-resistant, easy to clean, germ-resistant and neutral in odour and taste.
Easy activation of the filter stage
With the stainless steel diverter lever, you can quickly switch between filtered and unfiltered water.
Compatible with all standard taps
Thanks to a wide range of adapters, the Duo can be installed on almost all standard taps. Our thread guide helps you find the right adapter.
One housing, three cartridges
Choose between our drinking water cartridges Active, Active+ and Nano.
10-year warranty on the stainless steel housing
Our Duo stainless steel housings come with a 10-year manufacturer's warranty.
Made in southern Germany
The Duo filter housing is manufactured in southern Germany and meets Alb Filter's high standards.
Filtered or unfiltered?
With the stainless steel diverter lever, you decide with a simple flick: filtered water for drinking and cooking –
unfiltered water at full mains pressure for washing up.
This saves filter capacity and significantly extends the life of the cartridge.
Will it fit my tap?
The Duo fits all standard taps with an M22 female or M24 male thread – for other sizes, suitable adapters are available (selectable free of charge when ordering).
Not suitable for:
- pull-out taps without a locking mechanism
- taps with sensor technology
- permanently installed or oval/square aerators
- unpressurised water heaters installed upstream
In these cases, one of our under-sink water filters is a better choice.
What is filtered?
Active PFAS cartridge made of sintered activated carbon with PFAS absorber resin: the ion exchange resin binds long- and short-chain PFAS, while the activated carbon stage (5 µm) takes care of chlorine, off-flavours, microplastics and heavy metals.
PFAS – long- and short-chain
The ion exchange absorber resin reliably binds long- and short-chain forever chemicals such as PFBS and PFBA.
Chlorine and other off-flavours
The sintered coconut block activated carbon (5 µm) adsorbs unpleasant odours (chlorine, CHCs, CFCs and much more) and off-flavours in drinking water.
Microplastics and other fine particles
The pores of the activated carbon stage are around 14 times finer than a hair (5 µm) – microscopically small plastic particles and other particles are reliably trapped.
Pharmaceutical residues and pesticides
Organic compounds such as pesticides, herbicides, insecticides and pharmaceutical residues, as well as hormones and hormone-like substances, are reduced.
Heavy metals such as lead and copper
The adsorptive effect of the activated carbon binds and reduces heavy metals in drinking water.
PFAS absorber resin core
The ion exchange resin used to reduce long- and short-chain PFAS binds the contaminants like a magnet. The negatively charged PFAS ions are held in place by the positively charged anion resins, preventing them from being carried any further.
The patented RadiantFlow® technology ensures an even flow through the filter medium and delivers a high, reliable filtration effect throughout the entire working area of the granulate.
Binds odours and pollutants
The strong surface forces (adhesion) of the activated carbon remove unwanted cloudiness and odours such as chlorine from the water, as well as organic compounds and pollutants. These include pharmaceutical residues, hormones, pesticides/plant protection products, per- and polyfluoroalkyl substances (PFAS) and many more.
Retains microplastics
The activated carbon stage has pores of only 5 µm – around 14 times finer than a human hair. Microplastics, sand, rust and other particles are reliably trapped in them.
Development partner
Developed with instrAction® from Heidelberg
The absorber resin of the Active PFAS cartridge was created in close collaboration with instrAction® from Heidelberg, a specialist in innovative filter media. The P absorber resin was developed and tested for over ten years – Made in Germany.
- High selectivity for short- and long-chain PFAS
- Fast adsorption even at high flow rates
- Stable performance across the entire pH and temperature range
"The Active PFAS cartridge shows that our patented absorber resin can ensure highly effective PFAS retention to below the detection limit, even in compact systems such as the Alb Filter!"
Dr. Christian Meyer, Head of Production and Synthesis – instrAction®
What's included
- 1× Alb Duo stainless steel housing
- 1× Active PFAS filter cartridge
- 1× thread adapter M22 male to M24 male (alternative available free of charge)
Technical data
Duo housing
- Dimensions (H × W)
- 109 × 120 mm
- Weight
- 450 g
- Colours
- Natural stainless steel, matt, black
- Material
- V4A stainless steel
- Connection
- M22 × 1 female thread
Check the dimensional drawing: make sure there is enough space under the tap.
Active PFAS cartridge
- Dimensions (H × W)
- 102 × 56 mm
- Weight
- 115 g
- Filter material
- sintered activated carbon + PFAS absorber resin
- Filter technology
- mechanical, adsorptive, catalytic + ion exchange
- Filter type
- pollutant filter with a focus on PFAS
- Activated carbon pore size
- 5 µm (0.005 mm)
- Technology
- RadiantFlow®
- Replacement interval
- 4 months
- Capacity
- 3,000–5,000 l*
- Flow rate
- approx. 6 l/min**
Flow rate
Flow rate at approx. 3 bar water pressure
* Capacity depends on the quality of the incoming water. ** Flow rate at approx. 3 bar water pressure; filter performance depends on the flow speed.
Frequently asked questions
What thread does my tap have?
Most kitchen taps have an M22 female or M24 male thread. Unscrew the aerator and measure – our thread guide takes you to the right adapter in 4 steps.
What if the adapter doesn't fit?
We'll exchange adapters free of charge until one fits. Just write to us with a photo of your tap.
How much does the Duo reduce limescale?
The Active Plus+ cartridge reduces carbonate hardness by approx. 4–6 °dH through ion exchange – limescale stains on glasses and in the kettle visibly decrease.
Does the filter reduce the water pressure?
Filtered water flows at approx. 6 l/min (at 3 bar) – enough for drawing water and cooking. For washing up, you switch to unfiltered using the lever and get the full mains pressure.
Does the Duo fit pull-out taps?
Only if the spray head can be locked in place. The Duo cannot be fitted to freely movable hose spray heads or sensor taps.
Customer reviews
Genuine buyer reviews – invited after purchase, independently collected and published by REVIEWS.io.
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Oliver Verified buyer
Exactly how it should be
Translated from GermanTranslated from German · Show originalHide original
Genau so sollte es sein
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Eleonore Verified buyer
We're glad to be able to use this water filter now. Of course we use it all the time and have a much clearer conscience, because we're doing our bodies some good with it. Delivery and installation quick and trouble-free.
Translated from GermanTranslated from German · Show originalHide original
Wir sind froh diesen Wasserfilter nun einsetzen zu können. Wir verwenden ihn natürlich ständig und fühlen uns gewissensmäßig viel besser, denn wir tun unserem Körper damit etwas Gutes. Lieferung und Montage schnell und problemlos.
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Bettina Verified buyer
Very satisfied, water tastes better
Translated from GermanTranslated from German · Show originalHide original
Bin sehr zufrieden , Wasser schmeckt besser
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Christine Verified buyer
Easy installation, water tastes great
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Einfache Montage , Wasser schmeckt super
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Doris Verified buyer
Very good service, after we had ordered the wrong aerator adapter, it was exchanged free of charge after a quick phone call....Many thanks, happy to come back
Translated from GermanTranslated from German · Show originalHide original
Sehr guter Service, nachdem wir den falschen Perkolatoradapter bestellt hatten, wurde dieser nach kurzer telefonischer Rücksprache kostenlos umgetauscht....Vielen Dank ,gerne wieder
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Anonym Verified buyer
Super fast shipping, great product. Have been using it for 2 weeks now and you really notice a difference. The water tastes noticeably better.
Translated from GermanTranslated from German · Show originalHide original
Super schneller Versand, tolles Produkt. Habe es jetzt 2 Wochen im Einsatz und man merkt wirklich einen Unterschied. Das Wasser schmeckt deutlich besser.
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Constantin Verified buyer
Finally a tap filter that really takes PFAS seriously and still stays super practical. The switch lever is brilliant – when washing up or boiling water just flip it over and you save filter capacity + keep the full pressure. The stainless steel looks classy and feels high-quality. Installation was done in 4 minutes. The water tastes noticeably better.
Translated from GermanTranslated from German · Show originalHide original
Endlich ein Wasserhahnfilter, der wirklich PFAS ernst nimmt und trotzdem super praktisch bleibt. Der Umschalt-Hebel ist genial – beim Abwaschen oder Wasserkochen einfach umlegen und man spart Filterkapazität + behält den vollen Druck. Das Edelstahl sieht edel aus und fühlt sich wertig an. Installation war in 4 Minuten erledigt. Das Wasser schmeckt deutlich besser.
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