Filtering up to 1.75 liters a minute without any pumping, the high-capacity GravityWorks Water Filter System filter is one of the easiest and fastest ways to get filtered water in the backcountry. GravityWorks is ideal for bigger backpacking groups or basecamps, this system easily supplies filtered water for drinking, washing up, cooking, and cleaning. Simplify your water collection with the GravityWorks system and spend more time enjoying your group.

No pumping: Just fill the dirty reservoir, hang it, and let gravity do the hard work—yep, filtering water can be as easy as fill, hang, relax
Fast: Filters up to 1.75 liters per minute; microfilter lifetime up to 1,500 liters of water
Effective: Every microfilter is individually tested to ensure it meets all EPA & NSF guidelines for the removal of 99.9999% of bacteria and 99.9% of protozoa (This includes Giardia, Cryptosporidium, E. coli, Salmonella and Cholera)
Light & Compact: System weighs 12.3 oz and stows smaller than most 1L bottles
Field-cleanable: Microfilter can be easily backflushed in 4 seconds to maintain filter performance
Hollow Fiber Advantage: Hundreds of tiny, hollow fibers enable the microfilter to filter water faster than traditional filter media
Easy collecting & dispensing: Collecting water is easy—simply open the top, scoop water, and close; control delivery of filtered water with hose shutoff clamp
Comes with: Clean reservoir, Dirty reservoir, Hollow Fiber microfilter, hoses, shutoff clamp, and storage sack
Effective against bacteria/particulate/protozoa: Yes
Effective against chemicals/toxins/viruses: No
Filter media: Hollow Fiber
Filter pore size (microns): 0.2
Flow (L/min): 1.75 liters per min
Water Bottle Adapter: No
Material: Polyethylene
Weight: 12.3 oz
Dimensions: 10"W x 19.5"L
Assembled in U.S.A. of U.S. and Imported Materials