The MSR Guardian Purifier is engineered as one of the most advanced backcountry water purification systems available. Originally developed for military squads, it is built to perform reliably under the harshest conditions and when sourcing heavily contaminated water.
The Guardian meets NSF Protocol P248, the testing standard used by the United States military for the removal of viruses, bacteria, protozoa and sediment under worst-case water conditions. This makes it suitable for use in remote wilderness environments and regions where water quality cannot be guaranteed.
The pump delivers a high flow rate of 2.5 liters per minute without the need for chemicals, batteries or waiting time. With every pump stroke, the purifier automatically cleans itself. This self-cleaning mechanism prevents clogging and eliminates the need for backflushing or manual filter scrubbing, ensuring consistent flow performance even during extended use.
Its advanced hollow fiber cartridge features a pore size of 0.02 microns and is designed to treat more than 10,000 liters of water before replacement is required. The durable construction withstands heavy use, freezing temperatures and impacts. A water bottle adapter allows direct pumping into standard bottles for convenient hydration.
The MSR Guardian Purifier is ideal for global travel, expedition use, emergency preparedness and anyone requiring maximum protection when purifying water in demanding environments.
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