MSR Guardian Gravity Water Purifier

State-of-the-art virus protection in an easy, high-volume gravity system.

The Guardian Gravity Purifier has you covered with safe water around the world, removing viruses, bacteria, protozoa, sediment and microplastics - hands-free. Simply hang it while you go about your tasks at the hostel, basecamp, or campsite—its 10L reservoir supports the daily water needs of multiple people. Originally designed to protect servicemembers in the field, this rugged purifier handles the abuse of travel, and meets the NSF P248 military testing standard.                    

Features

• Ultimate Virus Protection
• Meets NSF protocol P248 military testing standard for removing viruses (99.99%), bacteria (99.9999%), protozoa (99.9%), sediment, and microplastics from “worst-case” water conditions
• Better-Tasting Water
• Two-stage purifier includes activated carbon to reduce chemicals and unpleasant tastes and odors
• Easy to Fill
• 10-liter reservoir is easy to fill at sinks and streams alike; covers daily water needs for drinking, cooking, and hygiene
• Simple Cleaning
• No backflushing required—simply opening the purge hose flushes the system to clean it and maintain flow rate
• The Guardian Gravity Purifier features a purge hose and valve to self-clean the system, no backflushing required. Open the purge valve to flush dirt and air until the water color matches the source water and is free of bubbles. This helps increase the flow rate, because air trapped in the purifier cartridge can reduce water flow. Hold the cartridge horizontally or gently tap the cartridge as water flows to help release the air
• Please note, the purge valve releases highly concentrated dirty water from the purifier. Do not allow any drops from the purge hose to splash into your clean water
• Fast Flow Rate
• Up to 1 liter in 2 minutes with optimal reservoir hang height of 6 feet, which is 2.5x faster than the next leading gravity purifier
• Engineered for Travel
• Rugged, military-grade construction. Compact system fits easily in carry-on luggage and smaller packs
• Water bottle adapter
• Cartridge replacement Indicator

Details

• How is a Filter Different From a Purifier?
• The main difference lies in the level of protection they provide. Generally speaking, a water filter is designed to remove waterborne protozoa and bacteria, but not viruses. A water purifier is designed to combat all three classes of microbes, including viruses
• Because North American backcountries are regarded as low-risk for viruses, filters typically offer a sufficient water treatment method. In places heavily trafficked by humans or where sanitation systems are poor, the risk for viruses increases. In these areas, such as in developing countries, a purifier is recommended
• Additionally, filters physically remove matter and microbes from the water. In contrast, a "purifier" can employ a variety of methods to do so, from physically removing the contaminants to disinfecting the water of them, through UV or chemical treatments
• Why the two treatment device options? The reason is, viruses are just too small for filters to catch. Far smaller than protozoa or bacteria, viruses slip through the technologies used in backpacking filters. Traditionally, UV light, chemical treatments, or boiling were required to deactivate viruses by scrambling their DNA or killing them. Today, new advancements in physical purifiers provide a convenient option to physically remove viruses quickly and easily
• The flow rates of physical purifiers are generally slower than that of filters, because the internal media that removes contaminants has to be small enough to capture tiny viruses. This slows the rate at which water passes through the media, decreasing overall flow rate
• Standards and Certifications
• Meets U.S. EPA Guide Standard and Protocol for Testing Microbiological Purifiers
• NSF P248 Testing Standard
• The most rigorous scientific certification for proving a treatment device safely removes claimed contaminants from challenging wilderness water sources. Guardian devices are the market’s only purifiers to pass the military standard P248 testing for virus removal
• Awards
• Gear of the Year 2021 | Feed The Habit

Specs

• Design
• Effective Against
• Bacteria
• Yes
• Chemicals/Toxins
• No
• Particulate
• Yes
• Protozoa
• Yes
• Viruses
• Yes
• Filter Media
• Advanced Hollow Fiber
• Maintenance
• Field-Cleanable
• Yes
• Field-Maintainable
• Yes
• Materials
• UF Hollow Fiber / ABS
• Measurements
• Filter Pore Size
• 0.02µ
• Flow Rate
• 0.13 gal US/min / 0.5 L/min
• Cartridge Life
• ≥ 792.5 gal US / 3,000L
• Dimensions
• Length
• 12” / 30 cm
• Width
• 4” / 10 cm
• Height
• 4” / 10 cm
• Reservoir Volume
• 338.1 oz (2.6 gal US) / 10L
• Weight
• 18 oz (1 lb 2 oz) / 530g
• Country of Origin
• Made in the USA of US and Imported Materials
• Manufacturer Product Code
• 14005