Many of the most common personal water filters are gravity-fed, meaning they use gravity to pull the water through a filter. Gravity filters are straightforward: You just pour the water into the ...

LifeStraw has become a big name in both the outdoors and emergency preparedness industries for its simple and easy-to-use personal water filters. While you’ve likely seen the brand’s signature ...

Gradually, gravity pulls the water beneath the surface ... After the water has propagated through the filter material, it is usually collected in a perforated PVC pipe underdrain, and then transported ...

Simply fill the clearly labeled “DIRTY” bladder with unfiltered water, elevate it above the “CLEAN” one, and make sure the filter arrow marking the “FLOW” of the filter is going from ...