BreakdownFiltering up to 1.75 liters a minute without any pumping, the high-capacity GravityWorks 4.0L water filter is one of the easiest and fastest ways to get filtered water in the backcountry. Ideal for basecamps, the system has an 8-liter total capacity, easily supplying filtered water for drinking, washing up, cooking, and cleaning. While it has a big capacity, it is also very compact. When properly stowed it is smaller than most 1L bottles.
This filter in wonderfully fast, but be warned it has trouble with very cold water and it must stay above freezing.
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