Uploaded February 2016 | Updated September 2026, 2 weeks ago

---

The Guardian Purifier was engineered to be extremely durable, but if you suspect that it may have been damaged in some way, you can perform this quick and easy integrity test in the field. A clear widemouth bottle is required, but no special tools are needed.

Learn more at msrgear.com/water-treatment/filters-and-purifiers/guardian-purifier/02370.html