MSR Guardian Purifier Pump
The world’s most advanced backcountry purifier.
- Ultimate Protection: Meets NSF protocol P248, testing standard used by U.S. military, for removal of viruses, bacteria, protozoa, and sediment from “worst-case” water conditions.
- Fast & Easy: Pumps a rapid 2.5 litres per minute, offering added viral protection without the need for chemicals, bulbs, batteries, or waiting.
- Self-Cleaning: Pump self-cleans on every stroke, providing consistently fast flow rates with zero hassle—no backflushing or filter-scrubbing ever required.
- Long-Lasting: Leading-edge hollow fibre cartridge treats up to 10,000+ litres.
Extremely Durable: Engineered to withstand heavy use, freezing, drops*, and harsh environments.
*Withstands MSR water lab drop testing: 6 ft. to concrete.
Effective against bacteria:
Effective against chemicals/toxins:
Effective against particulate:
Effective against protozoa:
Effective against viruses:
Advanced Hollow Fibre
Filter pore size (microns):
2.5 litres per min
Water Bottle Adapter:
Cartridge replacement indicator: