"What Our Gearhead® Experts Are Saying:""I've taken the Guardian on expeditions where water quality is genuinely questionable — glacial runoff, river crossings in remote terrain, and international travel — and it has never let me down. The self-cleaning design keeps the flow rate consistent without any extra effort, and knowing it handles viruses puts my mind at ease in a way that a standard microfilter doesn't.""Most water filters handle the common threats. The MSR Guardian Purifier System handles all of them. With a 0. 02-micron hollow fiber filter, it eliminates protozoa, bacteria, viruses, and particulate — the full spectrum of waterborne risk — making it the right tool for international travel, high-use water sources, and any situation where the stakes are too high for a standard microfilter. At 2. 5 liters per minute, it moves fast for a purifier, and the self-cleaning design maintains that flow rate in the field without manual intervention. A cartridge replacement indicator takes the guesswork out of filter life, and a rated lifespan of 10,000+ liters means this system will outlast seasons of heavy use without needing a replacement. When clean water is non-negotiable, the Guardian is the answer."
Price: $399.95 from Backcountry
| Merchant | Price | |
|---|---|---|
| $399.95 | Visit Store |
One of the many innovations with the new Guardian Purifier is its self-cleaning action, only requiring minor replacements once a year, and MSR stored all the small gaskets and springs you need to replace inside the Guardian Annual Maintenance Kit.
The hollow fiber filter in the MSR Guardian Filter Cartridge Replacement is meant to filter over 10,000 liters, but if you somehow surpass that, pick up the Guardian Filter Cartridge Replacement and enjoy another 10,000 bottles full of clean, clear, and...
