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Writer's pictureIvan

Building Your Own Gravity Feed Water Filter



A Practical and Affordable Solution


In a world where access to clean water can be a luxury during emergencies or outdoor adventures, having the knowledge and skills to create your own water filtration system is invaluable. This article will guide you through the process of building a gravity feed water filter using everyday items, inspired by a concept found in the "No Grid Survival Project" book. The focus is on practicality, affordability, and effectiveness, making this DIY project a must-try for anyone keen on self-sufficiency.


The Basics of Gravity Feed Water Filtration

The gravity feed water filter is a simple yet effective system that uses natural gravity to filter water through various layers of filtering materials. The design we're discussing involves three five-gallon buckets, a piece of three-quarter inch PVC pipe, a valve, glue, primer, and a hole saw. The bottom bucket acts as the catchment for the filtered water, with a valve attached for easy access. The entire setup costs around $50, making it an economical solution for clean water.


Step-by-Step Construction

Preparation: Begin by preparing the catchment bucket. Attach a foot-long PVC pipe to the bucket using glue and primer, ensuring a tight fit. Drill holes in the pipe to create a manifold, facilitating even water distribution.


Screen and Media Layers: The second bucket, with a series of drilled holes, holds the sand and gravel. A screen door material cut to fit the bucket's bottom prevents the sand from escaping. The third bucket, also with holes, contains the charcoal layer, crucial for removing impurities and bad taste.


Assembly: Stack the buckets in order, with the charcoal bucket on top, followed by the sand and gravel bucket, and finally, the catchment bucket at the bottom.


Practical Insights and Tips

Sand and Gravel: Source clean, washed sand and gravel. The first couple of scoops should be placed carefully to avoid displacing the screen.


Charcoal Preparation: Charcoal can be made from burnt wood in a stove or campfire. It should be pulverized into a fine powder for effective filtration.


Maintenance: It's normal for the first few batches of filtered water to contain charcoal, sand, or gravel particles. Running several batches through the filter helps clean it out.


Safety Precaution: Always boil the filtered water before drinking to ensure complete purification.


The Advantages of DIY Filtration

Building your own water filter has several benefits:


Cost-Effectiveness: At approximately $50, this DIY project is significantly cheaper than commercial options.


  • Educational Value: It's a great learning experience, teaching valuable skills in water filtration and self-reliance.

  • Customization: The filter can be modified or expanded based on specific needs and available materials.

  • Emergency Preparedness: In situations where clean water is scarce, this filter can be a lifesaver.


This DIY gravity feed water filter is more than just a project; it's a step towards self-sufficiency and preparedness. It exemplifies how simple, everyday items can be transformed into essential survival tools. Whether you're an outdoor enthusiast, a survivalist, or just someone interested in sustainable living, this water filter project is definitely worth your time.




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