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MSR

MSR Guardian Water Purifier for Backcountry Use, Global Travel, and Emergency Preparedness

    • Based on 442 reviews
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Availability: In Stock.
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Arrives Saturday, Nov 23
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Features

  • Military-grade water purifier pump removes viruses, bacteria, protozoa, and particulate from contaminated water sources virtually anywhere on earth
  • Meets NSF protocol P248 testing standard of the U.S. military, using medical-grade fibers to provide protection from the tiniest waterborne threats
  • Pumps at a rapid 2.5 liters per minute, treats up to 10,000 liters of water, and withstands freezing, drops, heavy use, and harsh environments
  • Pump self-cleans on every stroke, providing consistently fast flow rates with zero hassleno backflushing or filter-scrubbing ever required
  • Ideal for backcountry, expeditions, global travel, and survival; purifier pump measures 8.2 x 4.7 inches and weighs 17.3 ounces; made in the USA

Description

The MSR Guardian Water Purifier Pump was originally designed for the U.S. Military, who turned to MSR’s advanced water filtration technology to keep troops safe and healthy in every remote corner of the globe. Six years of research and development went into engineering the pump purifier, which removes viruses (such as norovirus, rotavirus, hepatitis A), bacteria (such as E. coli. Shigella, salmonella, cholera), protozoa (such as giardia, cryptosporidium, amoebae), and sediment from contaminated water sources anywhere on earth. It meets the strict NSF protocol P248 testing standard for the U.S. Military, using medical-grade fibers to provide protection from the tiniest microbiological waterborne threats. Designed to be fast, simple, and safe, it pumps at a rapid 2.5 liters per minute, has a long-lasting advanced filter that treats up to 10,000 liters of water, and withstands freezing temperatures, drops, heavy use, and harsh environments. A self-cleaning mechanism ensures reliability, flushing contaminants in the filter back into the source, so there is no backflushing or scrubbing cartridges to maintain flow. The MSR Guardian Water Purifier Pump is ideal for wilderness, backcountry use, expeditions, global travel, and emergency preparedness. It measures 8.2 x 4.7 inches and weights 17.3 ounces. Made in the USA.

Brand: MSR


Special Feature: Lightweight


Product Dimensions: 5.25"L x 5"W x 12.25"H


Package Information: Storage Bag


Installation Type: Portable


Power Source: Hand-powered


Item Weight: 2.2 Pounds


Model Name: Guardian


Maximum Flow Rate: 2.5 Liters Per Minute


Is Discontinued By Manufacturer ‏ : ‎ No


Product Dimensions ‏ : ‎ 5.25 x 5 x 12.25 inches; 2.19 Pounds


Item model number ‏ : ‎


Department ‏ : ‎ unisex-adult


Date First Available ‏ : ‎ July 22, 2015


Manufacturer ‏ : ‎ Cascade Designs Inc.


Country of Origin ‏ : ‎ USA


Best Sellers Rank: #22,603 in Sports & Outdoors (See Top 100 in Sports & Outdoors) #44 in Camping & Hiking Water Filters


#44 in Camping & Hiking Water Filters:


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Saturday, Nov 23

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews

    • Comes in a nice zip up case with a fine mesh screen on ...
Style: Water Purifier
I picked this up to have access to clean water for a group while backpacking/traveling or for emergency conditions where public water is contaminated. Think of boil water advisories when the local water main has broken. Remember this is a mechanical filter and that chemical or radiological contaminants are NOT removed by mechanical filters. This won't help you fix the water in Flint, MI or magically turn seawater into potable water. Eager to see how this works, I ran a little test with a water source I know is contaminated with coliform bateria. I took samples from the source and from the water filtered by this unit. Running the samples and a control through a test kit showed the filtered water was indeed bacteria free. Ultralight backpackers will balk at the weight but for me I appreciate the ease of use. I was surprised a how fast the filtered water comes out. Fits my Nalgene bottle perfectly. I don't have to mess with bags or wait around for gravity to work. Hose is long enough so you don't fall in the pond or river trying to scoop up water. Comes in a nice zip up case with a fine mesh screen on top so when you put it away the hose can dry off with out contaminating the rest of your stuff. Be sure to buy the annual maintenance kit which is sold separately - it contains o rings and other goodies to maintain your pump I like that this filters viruses. I wish I had had this on recent trips to India and the DR. Now I am better prepared! I also appreciate the fact that it backflushes itself on every stroke. Very clever. This thing is pretty expensive but it is so easy to use I am glad to have it. ... show more
Reviewed in the United States on December 10, 2016 by Sean E. Bowen
    • A robust easy to work water filter
Style: Water Purifier
This filter works well, fits right to the top of our stainless steel water bottles and provide safe drinking water to guests on our back-country horse riding expeditions anywhere we find water.
Reviewed in the United States on September 25, 2023 by Keith Swenson
    • Best purchase I've ever made for backpacking and hiking
Style: Water Purifier
This is by far the best purchase I've made out of all of the purchases I've made in buying adventure gear at places like REI, Cabelas, and Amazon. I've taken the Guardian on all of my backpacking trips for the past 2 summers. I also regularly take it car camping, hiking, canoeing, fishing, etc. This is one of my top 5 favorite adventure gear items that I own and take it every where I go. I don't know what I would do without it. I plan on taking it to Europe this summer as well. I was initially hesitant in making this purchase due to the price being $350, but have never looked back. I can honestly say it is one of the best purchases I've ever made. If you are on the verge of making a decision like I was at the time, I definitely (100%) think you should purchase it. You will not regret it. If you spread the cost over the 5-10yr lifespan of the product, then it is extremely easy to justify the cost. It is by far better than a lifestraw and other pumps out there. This is the best water purifier on the market for these reasons: it is the fastest for pumping water, the easiest to use, will filter through dirt, and filters the most contaminants (besides chemicals) vs. other filters on the market. For those reasons, I without a doubt recommend this! 5 stars! ... show more
Reviewed in the United States on August 3, 2018 by Customer
    • One of the best
Style: Water Purifier
Fantastic Water Purifier, I have used it several times on different trips and it has worked great
Reviewed in the United States on September 19, 2023 by Alan Baker
    • Works great.
Style: Water Purifier
The good is this filter is fast and easy to use. The filtered water tastes fine. I threaded it to my MSR dromedary which makes less things to hold while pumping water adding convenience. I bought a couple of MSR water bottles thinking they would thread on but they did not. This was a disappointment A friend borrowed the filter and it threaded on his bottle of a different brand (Nalgen?). I'll buy a water bottle like his next. I believe this is very overpriced but overall I like it. ... show more
Reviewed in the United States on July 20, 2023 by Tourist
    • Great product, i have been testing it out over ...
Style: Water Purifier
Great product, i have been testing it out over the last few days and the result is always the same, good tasting clean water no matter the water source and FAST. I read many reviews on water filters before purchasing one and this one was at the top of most list's and noted its down side was the size of the device upon receiving the guardian i would have to disagree the size is comparable to most systems and simple as could be for use. I will be taking it into the field on Friday for a week long backpack trip and after that i will comment more about the durability of the unit. As of now i am pleased with the quality it seams well built and easy to maintain and can be taken apart and serviced in no time if need be. It also came with a nice zip up carry case. I would say its well worth the money and will probably last me forever. Returned home from the trip, after a good field test I would go with 4.5 starts but will leave it a five. Wear the pump handle attaches to the plunger is a mixture of steel and plastic parts it held up fine but it is all held together with a plastic C clip, if you get much more than a moderate pump pace the clip hangs up and pops loud, I am certain this clip will fail and break at some point so i plan on finding a spare. The clip is basic something you would find at a auto parts store for cents and will be metal :) the other thing i noticed in the promotion video for the pump it says as long as the filter on the end is wet it it will pump only water and no air....that is mostly true but on 2 occasions it pulled air and we were forced to hold it under water and it primed up and was fine. Other then the clip it pumps and cleans water very fast and efficient its quiet and easy to set up and put away i would buy it again. ... show more
Reviewed in the United States on August 25, 2016 by Why do you care

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