Improvised Water Filter: Improvised Gear

In this series of blog posts, we teach you how to make different improvised gear. Of which one can find handy to make for and in survival scenarios. For this post, we’re going to discuss how to make an improvised water filter – two ways actually.

Plastic Improvised Water Filter

How to make a plastic improvised water filter: Requirements

  • A pebble or marble.
  • Small and large bowl.
  • Plastic shrink-wrap.

How to make a plastic improvised water filter: Steps

You have two bowls. Make sure your smaller bowl has a top lower than that of the bigger bowl. As you’ll want to place your smaller bowl inside of the bigger one. Further, also make sure that any liquids stay outside of the smaller bowl. The water you want to filter you’ll place in the bowl that’s larger. So pour that water in there.

Now cover loosely the bigger bowl’s top with a piece of plastic shrink-wrap. Also, remember to seal the edges. Then place a pebble or marble in the middle and have the wrap adjusted so it won’t have that much of a dip sticking in the plastic at the center.

Lastly, just place what you made in the sunlight. You then will be able to observe water rising up on the plastic’s surface from the bigger bowl section trying to escape and evaporate inside your filter.

Now, place the bowl in sunlight. The heat will cause water on the surface to evaporate and escape inside. Thus creating fresh drinkable water.

Bio-Filter

How to make a bio-layer improvised water filter: Requirements

  • Sand.
  • Activated charcoal or activated carbon.
  • 5 food grade five-gallon buckets.
  • Screen.
  • Plastic plumbing fittings.
  • Hole saw.
  • Water gallon container

How to make a bio-layer improvised water filter: Steps

Start by having the water gallon container faced upside down.

Then at its top, cut a hole where you’ll pour in your materials and the water you’re going to filter.

Note that your filter will have three layers to it.

Gravel is the first. Most noteworthy, it acts as the main filter to block debris common to water such as sticks and leaves maybe even insects.

Sand comes second. In essence, it’ll be the one to catch the debris gravel couldn’t.

Activated charcoal will be last. It’ll help then kill off any remaining impurities such as chemicals or pathogens.

To summarize, the bio-filter is of three separate layers; namely that of gravel, sand, and activated charcoal. These layers filter out any debris or impurities in the water.

Final Note:

For both filters, just to be sure, after filtration: You might want to boil the water to help purify it.


Gotten interested into making improvised gear? Then you might want to know how to make an improvised compass.

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