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Purifying Water with a Natural Filter — Charcoal, Sand & Gravel
Build a three-layer water filter from charcoal, sand, and gravel. Important: always boil filtered water for 1 minute — filtration alone does not kill all pathogens.
Baguhan
30-45 minutes
Mga Tagubilin
1
1
Filter Layer Diagram
Filter Layer Diagram
Water flows top to bottom through three layers: charcoal (chemical filtration) → sand (physical filtration) → gravel (structural support). Always boil after filtering.
Flow
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2
2
Make Charcoal
Make Charcoal
Burn hardwood until fully black. Smother with sand to stop combustion. Cool, then crush to pea-sized pieces. ~2 cups needed.
Tools needed:
Fire Starter
Utility Knife3
3
Assemble Filter
Assemble Filter
Container (bark cone, hollow log, or cut bottle). Grass plug at drain. Layer: 5-8cm gravel, 8-10cm sand, 5-8cm charcoal, thin gravel cap on top.
Design
Cross-section: labeled layers with measurements
Materials for this step:
Container1 piece
Tinder Bundle1 handful
Gravel2 cups
Fine Sand3 cupsCharcoal (Crushed)2 cups
4
4
Filter & Boil
Filter & Boil
Pour water slowly. Discard first dark batch (charcoal dust). By third pass, water runs clear. ALWAYS boil 1 minute before drinking.
Tools needed:
Fire StarterMga Materyales
5- 1 handfulPlaceholder
Mga Kinakailangang Kasangkapan
2- Placeholder
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CC0 Pampublikong Domain
Ang blueprint na ito ay inilabas sa ilalim ng CC0. Malaya kang kumopya, magbago, mamahagi, at gumamit nang walang pahintulot.
Suportahan ang Maker sa pamamagitan ng pagbili ng mga produkto sa kanilang Blueprint Komisyon ng Maker itinakda ng mga Vendor, o lumikha ng bagong bersyon ng Blueprint na ito at isama bilang koneksyon sa iyong Blueprint upang ibahagi ang kita.