MSR Guardian Gravity Water Purifier

The MSR Guardian Gravity Purifier is designed to remove viruses, bacteria, protozoa, and sediment. It meets the rigorous NSF P248 military testing standard, which confirms its ability to handle viral threats found in challenging water sources.

This system features a simple purge hose that allows you to clear out sediment and debris without the hassle of traditional backflushing. It is designed to be largely maintenance-free, making it ideal for extended expeditions where you want to spend less time cleaning gear.

With a 10-liter capacity and a flow rate of 0.13 gallons per minute, this system is well-suited for small to medium-sized groups. It provides a continuous, hands-free supply of purified water, allowing you to fill multiple bottles or cooking reservoirs efficiently.

Yes, the system uses a two-stage process. While the primary hollow fiber filter handles the heavy lifting of removing pathogens and sediment, the secondary activated carbon stage specifically targets unpleasant tastes and odors to make the water more palatable.

The system uses a manual indicator to help you track usage. With a total filter life of 792 gallons, you should monitor your usage over time to ensure you are consistently getting safe, purified water.

It weighs just 1.19 pounds and is designed to pack down compactly, making it a space-saving option for backcountry travel. While it is a high-volume system, its form factor is engineered to fit easily into a standard pack.