Under-sink activated carbon filters

Built & assembled in the EU
AQUAPHOR products are manufactured in our own production facilities located in Estonia
By technology
Water softening
Specific requirements for impurities reduction
RO membrane filtration rate
Water tanks
Additional parameters
by popularity
by popularity
Crystal H
Crystal H

Universal carbon block filter and special ion-exchange fiber that deeply purifies and softens moderately hard water


Universal carbon block filter for deep water purification

Crystal Solo
Crystal Solo

Compact filter for deep purification of water after whole house pre-filtration system

Crystal Solo B
Crystal Solo B

The smallest filter with a separate faucet

Crystal A
Crystal A

Universal CarbFiber block filter for water with visible residual turbidity.

Crystal A for hard water
Crystal A for hard water

Softening CarbFiber block filter for medium hard and turbid water.


Deep filtration system with antibacterial protection


Deep filtration and softening system with antibacterial protection

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Exploring POU filters: what is a flow-through adsorption system?

In an adsorption flow-through filter, special materials called adsorbents are responsible for the entire water treatment process. Unlike in gravity filters where water is pushed through the system by its own weight, the main driving force in undercounter filters is the water pressure.

In such filters, water passes through several stages of filtration: from mechanical pre-treatment (large insoluble particles) to fine filtration (soluble organic and inorganic compounds).

As a rule, a POU flow-through water filtration system is installed in the kitchen under the sink and connected to the water pipe (that’s why it refers to the general category of under-sink systems). The filter comes with a separate tap and replaceable cartridges. You can easily replace them yourself in the AQUAPHOR Crystal and Pro series.

High-quality under-counter adsorption filter removes unpleasant taste and smell of water, ensures protection against chlorine and anthropogenic pollutants.

The price of a filter depends on its performance, the number of cartridges, and the frequency of their replacement.

How does an under-sink adsorption filter work?

A flow-through adsorption filter removes contaminants dissolved in water with the special material — adsorbent.

In water treatment, activated carbon is the most common adsorbent. Carbon easily deals with chlorine and organochlorine, pesticides, oil products, etc. In under-counter systems, it takes the form of a dense carbon block.

There are other types of adsorbents: for example, ion-exchange resin, which reduces the water hardness by exchanging ions of Ca and Mg for the “neutral” Na.

AQUAPHOR filters also have a specially designed ion-exchange fiber for the heavy metals removal.

Fine filters combine a variety of sorbents and technologies to accommodate different needs and tap water problems.

Which POU adsorption flow-through filter should you choose?


To remove trace pharmaceuticals

Some models of the AQUAPHOR filters with activated carbon were tested for the ability to remove medicine residues from water. It is important since they do not disappear without a trace, but enter water bodies, and then public water supply.

Hormones and antibiotics are best removed by adsorption filters.


To eliminate rust

Particles of rust (iron oxide) are pretty large, and if there are a lot of them, the carbon block will get clogged. Increased dirt holding capacity is achieved due to the AQUAPHOR Pro cartridges. The layers of carbon mixture there are arranged in a special way. Compared to standard systems, the filter life in the Pro series is increased by approximately 20%.


To fight bacteria

Some flow-through filters include hollow fiber (HF) cartridges for antibacterial protection. The diameter of holes in the material is several times smaller than that of bacteria and cysts. It is safe to drink water after AQUAPHOR ECO series filters without boiling.

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