MSR Guardian Purifier Pump

Just back from 16 days on the muddy waters of the Green and Colorado Rivers. The Guardian Purifier and Guardian gravity filter provided all the water for 16 of us with ease. I was impressed by the simplicity and how quickly they produced excellent tasting clean water. Two thumbs up.

The best filter I have ever used. Took to Nepal last spring. Used it on canoe trips. Excellent product. Ridge Explorations LLC Donald Langlois, owner/director 52231 SE 496th Pl. Greenwater, WA 98022 360-663-2343 drlang@tx3.net www.RidgeExplorations.***

I have not used it, so I am not sure, sorry. I purchased it to add to my prep supplies. Thank you for asking.

Used it on several extended camping trips and the water quality was great.

Phenomenal piece of equipment for hiking. For large parties of people, it can provide clean water in suboptimal environments and in less than ideal conditions. It is heavy for short trips, but the flow rate is incredible when compared to other purifiers. For ultralight adventures, flow through filters are more ideal and better suited for weight conscious endeavors. Was used on Mt. Baker for party of 7 and it performed excellent.

Good product. Anytime I go in the wild I'll bring it with me.

It’s small enough to fit in my carry on when traveling overseas. Was useful in areas where the water quality is questionable. I filtered water for our entire group. Good quality.

I bought this 2-3 years ago for use on scout backpacking trips and emergency use during hurricane season. The thought was to have zero worries with water supply no matter where I was. The troop had another MSR filter with lower filtration pumping 1L per minute. Scouts became impatient and those were quickly abandoned to use mine. Win #1! We recently took a long distance backpacking trip and most groups used micropur tablets for sterilization, but not wanting to wait used this filter instead for immediate water consumption without an altered taste. Water supplies were typically streams or in some cases cisterns from rain collection or pumps which still needed sterilization. Win #2! One camp ran out of water in their cistern with zero streams for decent water nearby. I said not a problem and we filtered out of a cattle pond full of all kinds of bugs, algae and things no one wanted to deal with. This pump had zero issues and no one got sick. Win #3! Lessons learned: most of the time, filtration just occurred over one or two days, this last trip was longer. If the nalgene was too tight, it would cause leaks between the filter and the water bottle. The same occurred if the gray ring at the bottom was too tight to the red cylinder on the filter. Loosening those connections brought everything into alignment with no leaks. A gentle tightening was all that was needed. After each trip, I do pump some clean water through the filter thinking one or 2 extra liters won't impact the life of the filter. I hang the filter to dry out the entire length of hose, and invert the filter section with fibers so it drains as well. I've had zero issues with the performance of this filter and have full confidence whenever it is used. I still carry the maintenance kit with me, but it has yet to be used.