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MSR Guardian Gravity Purifier

The MSR Guardian Gravity Purifier is a state-of-the-art, high volume, gravity water filtration system.

Originally designed to protect service members in the field, this purifier has you covered with safe water in any situation. Simply fill, and hang it to remove protozoa, sediment, microplastics and bacteria. Its 10L reservoir supports the needs of large groups both in the field or at basecamp.



  • Ultimate protection: Meets NSF military testing standard for removing 99.99% viruses, protozoa, bacteria, microplastics and sediment from 'worst-case' water conditions
  • Better tasting water: two-stage purifier includes activated carbon to reduce chemicals and unpleasant tastes
  • Easy to use: No backflushing required, simply open the purge hose to flush and clean the system and maintain flow]
  • Fast flow rate: Up to 1L in 2 minutes, 2.5x faster than the next leading model


        • Weight: 530g
        • Size: 10 x 30cm
        • Flow: 0.5L per minute
        • Cartridge life: 3,000+ litres, with replacement indicator

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