craiyon logo

An instructional diagram showing a three-step water filtration process: pre-filtration using capillary action with ropes, filtration through a multi-layer vessel with sand, charcoal, and gravel, and disinfection with chlorine drops.

An instructional diagram showing a three-step water filtration process: pre-filtration using capillary action with ropes, filtration through a multi-layer vessel with sand, charcoal, and gravel, and disinfection with chlorine drops.

An instructional diagram showing a three-step water filtration process: pre-filtration using capillary action with ropes, filtration through a multi-layer vessel with sand, charcoal, and gravel, and disinfection with chlorine drops. Ver mais