Filtering up to 1.75 liters a minute without any pumping, the high-capacity GravityWorks Water Filter System is one of the easiest and fastest ways to get filtered water in the backcountry, ideal for bigger backpacking groups or basecamps.

The 4L system easily supplies filtered water for drinking, washing up, cooking, and cleaning, with an astounding cartridge life of 1500 liters. Simplify your water collection with the GravityWorks system and spend more time enjoying your group.

Specs

• Pump-free filtering; fill the reservoir, hang it, and let gravity do the work
• Fast — filters up to 1.75L per minute
• Microfilter lifetime up to 1,500L of water
• Light and compact, the full system weighs 11.5 oz and stows smaller than most 1L bottles
• Group-ready with an 8 liter total capacity
• Easily cleanable with a 4 second backflush to mainain filter performance
• Hollow fiber filtration enables the microfilter to filter water faster than traditional filter media
• Zip opening makes collecting water easy
• Meets all EPA & NSF guidelines for the removal of bacteria and protozoa, including giardia, cryptosporidium, E. coli, salmonella and cholera (not effective against viruses)
• Includes 4.0L Clean reservoir, 4.0L Dirty reservoir, Hollow Fiber microfilter, hoses, shutoff clamp, and storage sack