Under-sink water filters for kitchen and sink
Alb under-sink water filters are discreetly installed under the sink and deliver freshly filtered, neutral-tasting drinking water around the clock - without an extra tap or taking up space on the worktop.
Modular filter technology reliably reduces pollutants, chlorine, heavy metals and limescale, while valuable minerals are retained.
Alb under-sink filter
Bestseller
Maximum protection
Maximum protection
Bestseller
Bestseller
Decision guide
Benefits of the Alb under-sink filter
The filter is fitted under the sink between the cold-water angle valve and the supply hose in just a few minutes - no electricity, no tank and no waste water. Nothing changes on the tap itself: the filter stays out of sight.
Modular water filter
One housing for all Alb filter cartridges
Element version: Choose between the pollutant filters Active, Active Plus+ and Active PFAS and the bacteria filter Nano.
Fusion version: Combines two Element housings with one Active and one Nano cartridge to offer the widest possible filter spectrum and maximum safety for drinking water.
What is filtered?
Under-sink drinking water filters compared
Under-Sink Active
Under-Sink Active Plus
Under-Sink Fusion
Under-Sink Nano
Under-Sink Active PFAS
Under-Sink Fusion PFAS
- Clear column
- Strong reduction
- Significant reduction
- Partial reduction
- Not filtered
The all-round carefree option
Alb Filter Fusion
The Fusion version combines the Active and Nano cartridges into one powerful system. It is installed out of sight under the sink and delivers filtered drinking water straight from your tap.
With the Alb Filter Fusion, you cover the entire filter spectrum of the Active and Nano cartridges – the best possible filter performance with a good flow rate.
Active, Active Plus+ and Nano compared
The Element is integrated into the cold water line and filters every glass fresh as you draw it – even with unpressurized water heaters and low-pressure faucets.
Active binds pollutants with activated carbon
Activated carbon works like a sponge with a huge internal surface. Chlorine, pesticides and pharmaceutical residues stick to it, as do lead and copper from household pipes. The pores are around 7 times finer than a human hair – microplastics, sand and rust get trapped. Minerals such as calcium and magnesium flow through.
Active Plus+ also reduces limescale
The Active Plus+ filters pollutants like the Active and also reduces limescale. An ion exchanger binds part of the hardness and ideally lowers it by 4–6 °dH – good for coffee, tea and the kettle.
The fine-pored Bioton material also provides basic protection against germs down to 0.7 µm.
Nano membrane stops germs
The Nano cartridge contains thousands of ultra-thin tubes, similar to bundled drinking straws. Their pores are around 700 times finer than a hair and therefore smaller than bacteria: 99.999 % of germs and legionella stay out, entirely without chemicals, certified to ASTM F838-15A.
Under-sink filter or reverse osmosis system? Why the Alb Filter is the better choice
Two concepts compete under the sink – for clean drinking water in everyday life, the Alb under-sink filter is the better choice:
- Minerals stay: Pollutants, chlorine and, if desired, germs are retained, while calcium and magnesium stay in the water.
- No electricity, no tank, no wastewater: The Element sits compactly on the cold water line – even where there isn't enough space for a reverse osmosis system.
- Little effort: Cartridge change without tools, one cartridge lasts for 3,000 to 5,000 liters.
The reverse osmosis system does retain almost everything, but it also removes all minerals, produces wastewater with every liter and usually requires a tank, electricity and regular maintenance.
What our customers say
Genuine buyer reviews – invited after purchase, independently collected and published by REVIEWS.io.
Need help with your purchase?
Feel free to call us or send us an email!
Installation & use
Practical video guides for setting up and maintaining the Alb under-sink version (Element).
1Installation
With the Alb connection kit, the filter is connected under the sink to the cold-water angle valve – simply fit it between the angle valve and the supply hose.
2Cartridge change
For hygiene reasons, we recommend changing the drinking water cartridges at least every six months. The video shows how easy it is.
Questions about your installation setup? Call us: +41 41 792 1001 or write to us
Frequently asked questions (FAQ)
Selection & cartridges
Which system and which cartridge should I choose?
Start with a broad-spectrum filter (Active or Active Plus+): it reduces chlorine, off-flavours, heavy metals, pesticides and particles such as microplastics. The Nano germ barrier additionally filters bacteria and germs such as legionella or E. coli.
If you want to combine both stages, choose the Fusion set. With a low-pressure or water heater tap, the under-sink version is required – this is not possible on the tap (Duo).
Does the filter reduce the limescale content of the water?
Limescale is not a pollutant and is not the focus of the filtration. Only the Active Plus+ measurably reduces limescale via an ion exchanger – mainly for the taste of coffee and tea.
Depending on the water hardness, limescale is reduced, not completely removed. Deposits can still form in the kettle.
Can I use different cartridges in one housing?
Yes. All Alb drinking water and shower filter cartridges are compatible with every housing. This means you can also turn a drinking water filter into a shower filter – and vice versa.
Does an Alb Filter turn any water into drinking water?
The Nano germ barrier reliably filters bacteria and particles such as microplastics. Other pollutants are partially reduced - depending on the inlet concentration, flow rate and water parameters - in the best case to below the detection limit. This makes the water microbiologically safe.
Why doesn't the TDS or PPM value change?
The TDS value only measures conductivity (mainly salts and minerals), not the pollutant content. Alb filters leave valuable minerals in the water, so the value does not drop – a low TDS value therefore does not automatically mean clean water. A laboratory or a spectrometer is suitable for reliable analyses.
White flakes in the water – is that normal?
Yes. Light-coloured flakes are usually precipitated minerals (limescale) and are normal with fine-pored filters – even with the Active Plus+, as the water is only partially softened.
Use, care & cartridge change
What should I bear in mind if I don't use the filter for a long time?
Always observe the replacement intervals and ideally add a Nano germ barrier downstream. During longer breaks, remove Active and Nano cartridges and let them air-dry; the Active Plus+, on the other hand, must stay moist and remain in the housing.
Do not store cartridges in rice, in the fridge or in a sealed plastic bag.
How does the cartridge change work?
The change takes around two minutes and is done by unscrewing the cap. You'll find video instructions above in the ‘Installation & use’ section.
How do I dispose of used cartridges?
Used cartridges belong in the general waste and are incinerated, as pollutants have accumulated inside them. Please do not dispose of them in any other way.
How much water does one cartridge purify?
Guide values: Active approx. 3,000 litres or max. 4 months, Nano approx. 5,000 litres or max. 6 months. The actual capacity depends heavily on the quality of the incoming water; the cartridge is changed mainly for reasons of hygiene.
Does an Alb Filter reduce the water pressure?
Yes, every cartridge affects pressure and flow rate somewhat. Under the sink, a separate additional tap or a 3-way tap can compensate for the reduced flow.
Technology & certificates
Do Alb filters have test reports and certificates?
The Nano cartridge is certified to ASTM F838-15A and may even be used in public facilities during an acute legionella infestation.
What is the maximum temperature for the filter cartridges?
Active and Active Plus+: 5–45 °C. Nano: 5–65 °C.
How much limescale does the Active Plus+ cartridge filter?
It softens the water by ion exchange and changes the structure of the limescale so that it adheres less. Depending on the water hardness, it reduces hardness by 4–6 °dH under optimal conditions; with very hard water (≥ 18 °dH), the capacity is exhausted more quickly.
What do I need to consider about the Active Plus+ drying out?
The Active Plus+ is sensitive to drying out and must always stay moist. During a break in use, store it in distilled water; it is not designed to be dried.
Under-sink filter (Element)
How is the under-sink filter installed?
The filter is installed between the cold-water angle valve and the tap's supply hose using the enclosed connection kit. You'll find video instructions above in the “Installation & use” section.
Does the installation position of the housing matter?
No. The installation orientation – horizontal or vertical – has no effect on filter performance.
Technical data for the Element housing?
Dimensions 69 mm (W) × 120 mm (H); weight approx. 300 g (aluminium-magnesium) or 400 g (stainless steel); connection 1/2 inch female thread (inlet) and 1/2 inch male thread (outlet).