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MSR Guardian Purifier Pump

MSR Guardian Purifier Pump is rated 4.5 out of 5 by 54.
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4.5 Star Rating
4.5
$349.95

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Product Description Item No.   10304112

The MSR Guardian Purifier Pump is a water purifier for clean drinking water in the backcountry, traveling and emergency kits. Think of it as your own personal kitchen faucet, if your water always went directly into a bottle or other handy container first. The Advanced Hollow Fiber filter provides a 2.5L per minute flow, so that delicious water will quickly be able to quench your parched mouth, minus those pesky viruses, bacteria, or other harmful gunk. The self-cleaning cartridge has a life of 10,000+ liters, grab your calendar and schedule in plenty of time for the backcountry.

FEATURES of the MSR Guardian Purifier Pump

  • Stores easily
  • Reliability on long trips
  • Physically removes viruses, bacteria, protozoa, and silt in one easy step
  • Treats up to 10,000 liters
  • Built to withstand freezing temperatures as well as drops from up to 6 feet
  • Revolutionary self-cleaning performance means never back flushing again
  • Ultimate Protection: Meets NSF protocol P248, testing standard used by U.S. military, for removal of viruses, bacteria, protozoa, and sediment from "worst-case" water conditions
  • Fast and Easy: Pumps a rapid 2.5 liter per minute, offering added viral protection without the need for chemicals, bulbs, batteries, or waiting
  • Extremely Durable: Engineered to withstand heavy use, freezing, drops, and harsh environments
  • Nothing is safer or easier to use for purifying the most demanding backcountry water sources than the Guardian purifier
  • Originally designed for military squads, it brings this highly advanced technology to global travelers, backcountry users, and those stocking emergency kits
  • Fast and easy to use, this pump purifier offers the added viral protection you need when traveling in developing nations and popular wilderness areas
  • Its advanced hollow fiber filter offers the most reliable way to purify even filthy water conditions

- + Product Specifications
Length: 8.2 in.
Awards: Gear Junkie Best In Show Outdoor Retailer Summer Award - 2015, Outside Gear Of The Show - 2016, OutDoor Industry Telegraph - 2016, OutDoor Industry Gold Award Winner - 2015, Editors Choice Summer - 2016, Backpacker Magazine Editors' Choice Award - 2016, Gear Institute Best New Gear Outdoor Retailer Summer - 2015, National Geographic Adventure Gear of the Year Award - 2015, Innovation Award Winner Outdoor Retailer Summer - 2015, Gear Of The Year - 2015, Outside Magazine Gear of the Year Award - 2016, Outdoor Retailer Best of Show Award - 2015
Filter Rate: 2.5 liters / minute
Weight: 17.3 oz
Disclaimer: We only ship this brand to US Addresses.
Features: Made in USA, Self-Cleaning
Cartridge / Cycle Life: 10,000 liters
Best Use: Basecamp and Expedition, Travel, Camping
Effective Against: Protozoa, Bacteria and Viruses
Filter Type: Pump
Rated 1 out of 5 by from Dead after 15 liters!!!!! I purchased the MSR Guardian after speaking with MSR on 3 different occasions as well as several local shops. All assured me the Guardian was the perfect filter to take to the Grand Canyon to filter silty water. After filtering 15 liters of moderately silty water the filter died, all the water was being returned via the outlet hose. Following the directions, I cleaned the pressure relief valve but found it to be perfectly clean. The next step in the instructions is to replace the filter, unfortunately not an option deep in a remote section of the Grand Canyon. The filter appeared to be perfectly clean. When I called MSR, they admitted the Guardian has problems with silty water and was told "we've had problems with this pump". Of course this is unacceptable since they advertise this pump as being made for "worse case sediment". This ruined a 7 day backpack and forced us to hike out and drive 50 miles to purchase some treatment tables. I should have had a backup but everyone I talked to about this pump assured me of it's reliability. I expected much more of this product and from MSR Customer service.
Date published: 2016-11-12
Rated 5 out of 5 by from ULTIMATE PURIFIER ! Took it to my favorite spot up in the mountains and purified water that was brown from rain drainage coming off the mountain , tasted great and no grit , the next test I put it through was to purify the water that was in my green un cleaned swimming pool , tasted great
Date published: 2016-02-02
Rated 5 out of 5 by from ULTIMATE PURIFIER ! Took it to my favorite spot up in the mountains and purified water that was brown from rain drainage coming off the mountain , tasted great and no grit , the next test I put it through was to purify the water that was in my green un cleaned swimming pool , tasted great
Date published: 2016-02-02
Rated 1 out of 5 by from Died after 15 liters! Not ready for field use. I purchased the MSR Guardian after speaking with MSR on 3 different occasions as well as several local shops. All assured me the Guardian was the perfect filter to take to the Grand Canyon to filter silty water. After filtering 15 liters of moderately silty water the filter died, all the water was being returned via the outlet hose. Following the directions, I cleaned the pressure relief valve but found it to be perfectly clean. The next step in the instructions is to replace the filter, unfortunately not an option deep in a remote section of the Grand Canyon. The filter appeared to be perfectly clean. When I called MSR, they admitted the Guardian has problems with silty water and was told “we’ve had problems with this pump”. Of course this is unacceptable since they advertise this pump as being made for “worse case sediment”. This ruined a 7 day backpack and forced us to hike out and drive 50 miles to purchase some treatment tables. I should have had a backup but everyone I talked to about this pump assured me of its reliability. I expected much more of this product and from MSR Customer service.
Date published: 2016-11-13
Rated 5 out of 5 by from Guardian Filter I purchased this product a few months ago and it has performed just as advertised. We did a six day trek on the PCT last month finishing with The Whitney Summit. The three of us relied solely on the Guardian for our water purification. The speed and ease of use was great. We also own a couple of other MSR filters, but they have been stored away for back up. No drops just clean fresh tasting water. Since our PCT trek, we have hoofed it into some areas with not the greatest selection of running creeks, I would say a couple of times we pulled from stagnant pools, but still the Guardian performed.
Date published: 2016-08-15
Rated 5 out of 5 by from Beyond Excited I think the other review is a mistake, as the user is mentioning "cleaning the ceramic filter", as well as buying the product in 2015 (The Guardian is new for 2016). I have yet to put my Guardian through the ringer (will update when I do), but so far is appears to work as advertised. I performed an integrity test first thing and it's functional in that regard. I've thus far used the pump from small puddles where the pre-filter cannot be fully submerged and have not had any issues (basically works as advertised), but have yet to pump from silty and dirty sources. I will say the water thus far tastes great and the act of pumping is fast and not strenuous. While pumping, you can see the 10% backflushed water exiting, so I assume that's also working without issue. The device is somewhat bulky, but really it's not much bigger or heavier than comparable products that don't purify (i.e. filter viruses). It includes a nifty little zippered cloth storage case as well. If the hose is wrapped tightly and neatly around the device, the pump handle can close over the rubbery hose end and hold the wrapped up tubes in place very conveniently. If the pre-filter and backflushing mechanism works in really silty, muddy sources as advertised (I don't see why it won't), then I'll likely have this device for many decades. It seems very sturdy and it's totally believable that it meets the advertised crush/drop/freeze tests. Any part that might be susceptible to long term wear (like the pump handle, tubes/pre-filter, etc.) appear to be, or clearly are, replaceable. In short, this revolutionary device is thus far working exactly as you'd expect it to from the Peru video, etc. and gives me the confidence to partake in much longer backpacking trips in the desert where adequate sources are rare and other pumps require a lot of babying. The convenience factor is through the roof on this product, and while everybody else is wasting daylight waiting on iodine tablets, finicky filters that require additional treatment for viruses and/or careful source selection, gravity fed filters, etc. I'm confidently plopping my Guardian in whatever dirty, nasty source I come upon, pumping for a few seconds, and then ready to go. As a result, I carry much less water, and thus weight, in general because I no longer have to be picky about where I'm getting my water. Lastly, one thing I do hear from people interested in the Guardian is "$350, that's awfully steep". As far as initial investment goes, yes, it is markedly more than other pumps/filters, but over the long run, iodine tablets can cost over $3500 for 10,000L of purification (and don't filter particulate). Other purification methods take time, require a lot more care an attention, break frequently (I'm looking at you, Steripen), require much more frequent filter changes, etc. Doing the math for my own personal needs, the Guardian comes out as by far the most economical and convenient product over the long run, but I encourage people to consider their own specific needs.
Date published: 2016-01-26
Rated 5 out of 5 by from Beyond Excited I think the other review is a mistake, as the user is mentioning "cleaning the ceramic filter", as well as buying the product in 2015 (The Guardian is new for 2016). I have yet to put my Guardian through the ringer (will update when I do), but so far is appears to work as advertised. I performed an integrity test first thing and it's functional in that regard. I've thus far used the pump from small puddles where the pre-filter cannot be fully submerged and have not had any issues (basically works as advertised), but have yet to pump from silty and dirty sources. I will say the water thus far tastes great and the act of pumping is fast and not strenuous. While pumping, you can see the 10% backflushed water exiting, so I assume that's also working without issue. The device is somewhat bulky, but really it's not much bigger or heavier than comparable products that don't purify (i.e. filter viruses). It includes a nifty little zippered cloth storage case as well. If the hose is wrapped tightly and neatly around the device, the pump handle can close over the rubbery hose end and hold the wrapped up tubes in place very conveniently. If the pre-filter and backflushing mechanism works in really silty, muddy sources as advertised (I don't see why it won't), then I'll likely have this device for many decades. It seems very sturdy and it's totally believable that it meets the advertised crush/drop/freeze tests. Any part that might be susceptible to long term wear (like the pump handle, tubes/pre-filter, etc.) appear to be, or clearly are, replaceable. In short, this revolutionary device is thus far working exactly as you'd expect it to from the Peru video, etc. and gives me the confidence to partake in much longer backpacking trips in the desert where adequate sources are rare and other pumps require a lot of babying. The convenience factor is through the roof on this product, and while everybody else is wasting daylight waiting on iodine tablets, finicky filters that require additional treatment for viruses and/or careful source selection, gravity fed filters, etc. I'm confidently plopping my Guardian in whatever dirty, nasty source I come upon, pumping for a few seconds, and then ready to go. As a result, I carry much less water, and thus weight, in general because I no longer have to be picky about where I'm getting my water. Lastly, one thing I do hear from people interested in the Guardian is "$350, that's awfully steep". As far as initial investment goes, yes, it is markedly more than other pumps/filters, but over the long run, iodine tablets can cost over $3500 for 10,000L of purification (and don't filter particulate). Other purification methods take time, require a lot more care an attention, break frequently (I'm looking at you, Steripen), require much more frequent filter changes, etc. Doing the math for my own personal needs, the Guardian comes out as by far the most economical and convenient product over the long run, but I encourage people to consider their own specific needs.
Date published: 2016-01-26
Rated 4 out of 5 by from Great filter. easy to use So bought this filter cause I wasted 80$ on a katadyn vario just to have it break on first time use during a backpacking trip. Went recently on a 4 day trip on the buffalo river with the guardian. Prob overkill but I enjoy the ease of mind I don't have to worry about viruses and the durability seems to be way greater then other filters. My only problem I noticed it that it leaks water from plunger when pulling handle out. I haven't even had this product for 3 months now and seems that the O ring is bad and or failing. 350$ price tag i'd expect longer use. Will get with MSR and see if they can offer any help. Over all experience though has been great. 2 liters of water lasted me the whole trip and refill didn't take long at all. absolutely love how the hoses just wrap around the filter... so great and easy. Like the case it comes with as well very compact and fits well.
Date published: 2016-04-28
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For the MSR Guardian; are spare parts/components available? Or is a second unit the best "spare"? 

Asked by: iceman01
Hey there, Thanks for reaching out to us! Your best bet if you're seeking spare parts would be to contact MSR directly at: 206-505-9500.
Answered by: Rocko Gigsby
Date published: 2016-09-05

I didn't see any information on whether the filter could be changed, or if there were any indicators on when it needed changed. Looks awesome, definitely considering the purchase.

Asked by: Mike
Hey there, Thanks for the question. The filter cartridge on this item can be replaced/changed. You typically will know to change it when the flow rate drops to less than 1L a minute when pumping 70 strokes per minute. The filter will still be purifying water, but as the flow rate drops with use more wear appears on the internal parts. I hope this helps.
Answered by: Rocko Gigsby
Date published: 2016-11-13

Will this convert salt water?

Asked by: Duke
No, this is simply a filter which does not remove chemicals, toxins, or heavy metals. It is effective down to 0.02µm (microns). (Technical info from the MSR website). If you're looking for a portable, hand operated desalinator, check out Katadyn.
Answered by: Dane
Date published: 2016-12-04

Does this only screw on to wide mouth bottles?

Asked by: rotsfactor4
Hey there, Thanks for reaching out to us! The pump does not adjust in size and can only screw on wide mouth bottles.
Answered by: Rocko Gigsby
Date published: 2016-09-05

Where can the spare filters be bought & about how much do they cost?

Asked by: Hanko
Hey lugnut!! Look on page 2 & you will find the replacement filters! DUH!
Answered by: Hanko Jr
Date published: 2016-09-07

Is the price correct on this filter? $349.95?

Asked by: Rafi
Hey there, Thanks for reaching out to us! Listen....if you EVER want to pay more for ANY item we carry....you just let me know, k? I'll be more than happy to make that happen. We'll set up a system. Just you and me, buddy. Pals for life! But, as for this item, it is in fact $349.95. Hope this helps you out!
Answered by: Rocko Gigsby
Date published: 2017-01-27
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