The MSR Guardian Water Purifier is the world’s most advanced backcountry portable water filter, designed to purify water for off the road travellers. Originally designed for military squads, the MSR Guardian Water Purifier brings this highly advanced technology to global travellers, backcountry users, and those stocking emergency kits. Nothing is safer or easier to use for purifying the most demanding backcountry water sources. Fast and easy to use, this pump purifier offers the added viral protection you need when traveling in developing nations and popular wilderness areas. Its advanced hollow fibre filter offers the most reliable way to purify even filthy water conditions. Add its long-lasting performance and revolutionary self-cleaning ease, and this may be the only treatment device you’ll ever need. Features 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 back-flushing 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. Field cleanable: Yes Field maintainable: No Mechanical advantage: Yes Water Bottle Adapter: Yes Cartridge replacement indicator: Yes Video Specification Manufacturer: MSR
