How Does a Water Filter Work?
The BWT 4 Stage Filtration

A table water filter is an effective solution to improve the quality of your drinking water. But how does a water filter work? In this article, we explain the various stages of the filtration process and how they contribute to improving your tap water.

How a Water Filter Works
How is a BWT water filter constructed?
Which filter is right for you?
Our Magnesium Technology: More than Mineralization
How does activated carbon work in a water filter?
What can be learned from how a water filter works?

Contaminants

Protects appliances from limescale and reduces chlorine & heavy metals.

Mineralize water

Customizable to taste: Optionally mineralize water with magnesium, zinc, or siliate.

Drink local water

Enjoy the best water from home and avoid unnecessary transportation.

Save plastic bottles

Avoid bottled water and save up to 120 single-use bottles per month!

HOW A WATER FILTER WORKS

In general, it can be said that water filtration addresses several aspects:

Scale Protection: Protects household appliances from limescale deposits.
Taste Improvement: Reduces chlorine for better taste.
Reduction of Heavy Metals: Removes harmful metals such as lead and copper.
Water Softening: Reduces calcium and magnesium in the water.

The uniqueness of our table water filters goes even further: In addition to the classic filtration processes, your tap water is also mineralized with BWT:

How does it work?

How is a BWT Water Filter Constructed?

The BWT table water filter goes through a 4-stage filtration process during magnesium mineralization:

Particle Filtration (Inlet): This stage removes coarse particles. Particles larger than 200 µm are effectively filtered out.
Ion Exchange Process: In this phase, calcium and heavy metal ions are exchanged for magnesium and hydrogen ions. This protects against limescale while simultaneously increasing the magnesium content in the water.
Activated Carbon Filtration: Activated carbon reduces chlorine and organic contaminants such as herbicides and pesticides. This step is crucial for improving taste and removing substances that affect the flavor.
Particle Filtration (Outlet): A final filtration step ensures the removal of remaining particles, guaranteeing that the water is pure and clear.

Particle filtration is the first and last step in the filtration process. It ensures that all visible and invisible particles larger than 200 µm are removed from the water, further enhancing the clarity of the water.

Which Filter is Right for You?

We can customize our filters for you, whether you're a coffee enthusiast or a cross-country skiing aficionado. Depending on your needs, our cartridges are tailored to you:

BWT Magnesium Mineralized:

Magnesium in drinking water enhances the taste of beverages and food, supports the muscle and nervous system as well as bone and dental health, and reduces fatigue.

The filter technology protects household appliances by reducing lime content, eliminating odor- and taste-disturbing substances, and removing particles and heavy metals.

BWT ZINC Magnesium Mineralized:

Zinc in drinking water strengthens the immune system, promotes the growth of skin, hair, and nails, and supports wound healing.

The filter technology protects household appliances by reducing lime content, removing odor- and taste-disturbing substances as well as organic impurities, and filtering out particles and heavy metals from the water.

BWT Balanced Alkalized Magnesium Mineralized:

Increases the pH level of water and helps balance the acid-base equilibrium, supports metabolism and digestion, and provides more energy and vitality.

The filter technology eliminates odor- and taste-disturbing substances as well as organic impurities and filters particles and heavy metals from the water.

Magnesium Mineralized Warter cartridge for filtering water in the BWT jug

Zinc + Magnesium Mineralized Water filtercartridge for the jug

EN-filterkartusche-MMW-balanced-alkalized-water

Our Magnesium Technology: More than Just Mineralization

The magnesium technology is a core component of our table water filters. The ion exchange process ensures that calcium ions are replaced with magnesium ions. This has several benefits:

Scale Protection: Magnesium is much more soluble than calcium, leading to fewer limescale deposits.
Taste Improvement: Magnesium acts as a flavor enhancer, improving the taste of water.
Health Benefits: The daily magnesium requirement for an adult is 300-400 mg. A table water filter can release between 5-40 mg of magnesium per liter, helping to meet this requirement.

Magnesium as a flavor enhancer in coffee is, by the way, an underrated factor in enjoying a perfect cup of coffee.

BWT AQUAlizer table water filter fills two glasses with mineralised water

How Does Activated Carbon Work in a Water Filter?

Activated carbon is a natural, porous material used in granular form in table water filters. The main functions of activated carbon are:

Chlor Reduction: Removes chlorine, which affects the taste and smell of water.
Reduction of Organic Impurities: Filters certain organic impurities such as herbicides or pesticides that may be present in the water.
Microbiological Safety: The activated carbon is impregnated with silver to ensure microbiological safety. Small amounts of silver may be released into the water, which is completely safe and compliant with WHO guidelines.

What Can Be Learned from How a Water Filter Works?

A table water filter offers numerous benefits, from improving taste to reducing harmful substances in the water. If you value pure and healthy drinking water, a table water filter from BWT is the ideal solution. Our patented magnesium technology is the only one that provides limescale protection, reduces heavy metals and taste-disturbing substances, and simultaneously mineralizes the water with valuable magnesium.