Finished another weekend project – a DIY water filtration/purification system using Black Berkey filter elements. I like the Berkey filters, but $200+ for a Berkey Light system is a bit much. However, you can buy the filter elements separately and make your own water containment units.
I followed a procedure pretty close to what is detailed here, except I drilled four holes and used two nylon bolts with rubber washers and wingnuts to hold the lid to the bottom of the top bucket, instead of relying solely on the elements and their plastic wingnuts to do it.
Total cost: right around $125.