A 7-zone sediment filter with activated carbon is a multi-stage water filter that removes a broad range of harmful substances by combining different filter materials. Each zone targets particular contaminants in order to optimise water quality. Here is a typical structure:

Structure of a 7-zone sediment filter with activated carbon

1. Pre-filter (sediment filter)

   • Material: fine-pore polypropylene or another mechanical filter material.
   • Function: removes larger particles such as sand, rust, silt and other sediments that cloud the water.

2. Granular activated carbon (zone 1)

   • Material: activated carbon from coconut shells or coal.
   • Function: adsorbs chlorine, pesticides, organic compounds and substances responsible for poor taste and odour.

3. Ion exchange resin (zone 2)

   • Material: resin with cation and anion exchange capacity.
   • Function: reduces dissolved heavy metals such as lead, copper and arsenic and lowers water hardness by removing calcium and magnesium ions.

4. Fine-pore activated carbon block (zone 3)

   • Material: compacted activated carbon.
   • Function: adsorbs smaller contaminants such as residual chlorine and other dissolved organic substances.

5. Mineralization zone (zone 4)

   • Material: mineral stones or ceramic beads.
   • Function: enriches the water with useful minerals such as calcium, magnesium and potassium, improving taste and raising the pH.

6. Silver-coated granular activated carbon (zone 5)

   • Material: activated carbon with silver ions.
   • Function: inhibits the growth of bacteria and microorganisms in the filter.

7. Fine filtration (zones 6 and 7)

   • Zone 6: a fine particle filter removes microscopic particles such as microplastics.
   • Zone 7: a final layer of ceramic or membrane filter material ensures the water is clear and free of remaining contaminants.

Additional features

• Multi-stage adsorption: each zone performs a specific task to clean the water thoroughly.
• Longer life: the sediment layer protects the inner filter zones from clogging.
• Ionization and alkalization: the mineralization zone makes the water alkaline (higher pH).

How it works

1. Inlet stage: the raw water first passes the sediment filter, which removes larger particles.
2. Activated carbon layers: chlorine, volatile organic compounds, pesticides and organic compounds are adsorbed.
3. Ion exchange: heavy metals and excess hardness are reduced.
4. Mineralization: useful minerals are added, raising the pH and making the water alkaline.
5. Fine filtration: tiny particles and any remaining contaminants are removed.

Advantages of a 7-zone filter with activated carbon

• Comprehensive purification: removes sediments, chemicals, microorganisms and heavy metals.
• Better taste: removes substances that affect odour and taste.
• Health-supporting: adds minerals and produces alkaline water.
• Durability: the multi-layer structure extends the life of the filter.