GravityWorks Water Filter

The GravityWorks system uses the natural force of gravity to push water through the filter element, eliminating the need for manual pumping. You simply fill the dirty water reservoir, hang it above the clean water reservoir, and let the system do the work while you focus on camp tasks.

While the high capacity makes it excellent for groups, it is also a great choice for solo hikers who want to filter large amounts of water for cooking and cleaning in one go. However, if you are strictly counting ounces for a fast-and-light solo trip, you might find the 4.0L or 6.0L system bulkier than a standard squeeze filter.

The system is quite efficient, capable of filtering up to 1.75 liters per minute. This rate is consistent as long as the filter element is clean and the gravity head—the height difference between the two bags—is maintained.

The capacity refers to the size of the dirty water reservoir included in the kit. The 4.0L system provides a total capacity of 8 liters when combined with the clean water reservoir, while the 6.0L system provides a total of 12 liters, making it better suited for larger groups or basecamps where water access is limited.

The GravityWorks filter is designed to remove bacteria and protozoa, which covers the primary contaminants found in most backcountry water sources. It is not a purifier, so it does not remove viruses, which are typically a concern in specific international travel scenarios rather than standard North American wilderness areas.