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How to assemble the filter:
Cut the PET bottle in half, leaving about 20 cm at the neck. Try to make a precise cut to make assembly easier.
Then, using a sharp, heated object, make several holes in the lid.
Using scissors, prepare the neck to receive the filter. Place cotton inside the bottle’s spout, forming a first filter layer.
Then, boil some charcoal in a pot of water. Remove the coals and place them on a plate.
Crush them with your hands, pressing them between your fingers to grind them and turn them almost into a powder.
Wash the stones thoroughly in clean water, using an old toothbrush or a regular clothes brush.
On top of the cotton, add a layer of crushed charcoal, followed by a layer of sand and finally a layer of small stones.
Each layer must be placed carefully to maintain proper compaction.
Fit this part with the filter layers inside the other half of the bottle, which will act as a reservoir for the already filtered water.
To use the filter, simply pour the water to be purified into the top and let it slowly pass through the layers.
Keep in mind that this filter does not remove very small particles such as dissolved salts, so it is recommended that you boil the filtered water or treat it with a small amount of sodium hypochlorite to ensure safety.
Check out a practical guide below for setting up an efficient homemade water filter using charcoal.
Did you know that it is possible to transform simple materials into an effective homemade filter and even generate income from it?
Yes, thousands of people still don’t know about this charcoal trick that can make all the difference in water purification.
In a scenario where access to drinking water is still limited for many families, alternative solutions become essential to ensure health and well-being.
Although the supply of treated water should be a commitment of public bodies, it is possible to assemble a functional filter at home with boiled charcoal and other accessible items, which helps to remove impurities and make the water safer for consumption.
In this guide, you will learn step by step how to assemble your own homemade filter and discover how this simple practice can benefit your health — and even your wallet.
Check out the materials needed and see how to apply this powerful technique!
Materials needed:
-
- Coal
- 1 PET bottle
- Scissors
- Cotton
- Small stones (from an aquarium, for example)
- Sand (aquarium or other clean sand)
How to assemble the filter:
Cut the PET bottle in half, leaving about 20 cm at the neck. Try to make a precise cut to make assembly easier.
Then, using a sharp, heated object, make several holes in the lid.
Using scissors, prepare the neck to receive the filter. Place cotton inside the bottle’s spout, forming a first filter layer.
Then, boil some charcoal in a pot of water. Remove the coals and place them on a plate.
Crush them with your hands, pressing them between your fingers to grind them and turn them almost into a powder.
Wash the stones thoroughly in clean water, using an old toothbrush or a regular clothes brush.
On top of the cotton, add a layer of crushed charcoal, followed by a layer of sand and finally a layer of small stones.
Each layer must be placed carefully to maintain proper compaction.
Fit this part with the filter layers inside the other half of the bottle, which will act as a reservoir for the already filtered water.
To use the filter, simply pour the water to be purified into the top and let it slowly pass through the layers.
Keep in mind that this filter does not remove very small particles such as dissolved salts, so it is recommended that you boil the filtered water or treat it with a small amount of sodium hypochlorite to ensure safety.
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