Polyester Water Filter

This is an inexpensive, light weight filter for your emergency backpack. It is to be used to filter water before you boil it in an emergency situation. The video below demonstrates that this filter works wonderfully. This filter can be washed and reused for up to 3 years.

It can also extend the life of an expensive water filter by using it as a pre-filter before you run the water through the expensive filter.

Take a plastic empty water bottle that has a smooth neck (highly recommended) and cut off the bottom. Find or buy an article of clothing that is made of 100 percent polyester non-stretchy tight weave fabric. Cut it into 2 inch to 3 inch strips. Get the polyester a little damp and role it into a roll. Make each layer snug but not too tight (If you stretch the fabric, the holes increase in size making it a less effective filter). Make the diameter of the roll big enough to insert into the water bottle. It needs to form a fairly tight seal against plastic.

Then you pour the water into the bottom of the water bottle where you cut it off and it will filter through the fabric and out the top part of the bottle.

If the water has a large amount of sediment, you can do 2 water bottles one on top of the other.  You can also put a layer of charcoal between the 2 bottles to eliminate bad odors or odd taste of the filtered water.

The water should have the appropriate amount of bleach, four drops per quart added or heat to a rolling boil (think of the ever-useful survival saying “big bubbles, no troubles”) to ensure that all of the organisms have been killed.