How to Choose a Water Filter or Purifier
MSRÂ Guardian Purifier
$399.95
Members get an est. $39.99 in rewards
Fast and easy to use, the MSR Guardian Purifier physically removes viruses, bacteria, protozoa and dirt, so you can stay hydrated on backcountry trips and international travel.
- Unlike conventional hollow-fiber technology, the advanced medical-grade fibers in the Guardian block viruses—something most other hollow-fiber filters cannot do
- Physically removes viruses, bacteria, protozoa and particulate, including hepatitis A, E. coli, giardia, cryptosporidia and more
- Purifies 2.5 liters per minute
- With every stroke, the purifier uses 10% of its water to flush the contaminants in its filter back into the source; this means you'll never have to hassle with back-flushing
- Rugged construction is designed to withstand freezing and drops up to 6 ft.
- Cartridge life: 10,000 liters
Imported.
View all MSR Pump Water Purifiers| Best Use | Backpacking Camping Travel |
|---|---|
| Filter Type | Pump |
| Filter Medium | Advanced hollow fibers |
| Removes/Destroys | Protozoa, Bacteria And Viruses |
| Pump Force | 4 pounds |
| Pump Strokes per Liter | 35 |
| Output | 2.5 liters per minute |
| Housing Material | Polyurethane |
| BPA Free | Yes |
| Field Cleanable | Yes |
| Dimensions | 8.2 x 4.7 x 3.5 inches |
| Weight | 1 lb. 1.3 oz. |
Buying Advice
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Most Helpful Favorable Review
Great purifier Four years and counting
Craig8 months ago
Have used this four seasons now. Excellent purifier. we’ve never had an illness on a backcountry trip. So that speaks for itself. We use it about 14 days/nights a year. Additionally on occasional long distance day hikes every year. Great for peace of mind.
Craig
CO
6 people found this review helpful
Most Helpful Critical Review
No Support
Dave10 months ago
This is an amazing filter if you never plan on regular use. Small parts break and there is ZERO support from MSR. It will undoubtedly end up a $400 paper weight.
Dave
28 people found this review helpful
Bob
Denver, CO
Nonexistient customer support
4 months ago
Had my pump break after a couple of years of use. It's plastic, plastic breaks. No big deal. I submitted a warranty claim asking to buy new parts. It's been six months. Nothing. I fixed the pump myself with some JB weld and a prayer. I don't think I can trust it as my main pump anymore, and it's far too heavy as a back-up. Very disappointed. Oh how the mighty have fallen.
Age:35–44
No, I do not recommend this product
Dave
No Support
10 months ago
This is an amazing filter if you never plan on regular use. Small parts break and there is ZERO support from MSR. It will undoubtedly end up a $400 paper weight.
Craig
Colorado
Great purifier Four years and counting
8 months ago
Have used this four seasons now. Excellent purifier. we’ve never had an illness on a backcountry trip. So that speaks for itself. We use it about 14 days/nights a year. Additionally on occasional long distance day hikes every year. Great for peace of mind.
Age:55–64
Yes , I recommend this product
NJGB
Purifier
9 months ago
Clean , safe water is a non-negotiable. Researched the "best". Had this system for about 4 yrs. Ordered from REI. super bulky, I know the cruddy-looking water is safe; ditto the "clean" stuff; something may have died further up in the water. NEVER trust any water! I always filter. always. Had water -borne illness and it is really awful, esp in another country. Not too thrilled with the bulk and expense; but being sick in a remote in the location worse; a LOT.
BenbyVi
A must for Travel .
1 month ago
Piece of mind. Very happy with this top of the line purifier. Be gentle with the pump and it will give you years of service. Never had an issue. 10,000 liters of cartridge life, thats a lifetime. I simply store it away after a trip, no need to clean. Last trip was in Baja, Mexico. A 950 mile bicycle tour. Used it mostly on toilet tanks. Never got sick. As good as bottled water. My next trip is south america. Again, just be gentle with the pump. No twisting. I just throw the floater into a stream or river. No need to position it. Awesome product
Eric
I expect more at this price point.
1 month ago
Purchased from a different vendor. Used it multiple times. I will start with my biggest complaint. There are two connected hoses with a flat float at the input end. They are oriented parallel to the pump handle but need to be perpendicular to the water they draw from. The result is that using the pump in the most comfortable position causes the hoses to twist and come out of the water. It takes a lot of trial and error to get everything positioned right, especially when collecting from running water. For the price I expect a better user experience. Seems effective in that I haven't gotten sick from water filtered through this device. Form factor is bulky and heavy. Pump action is smooth and fairly easy.
No, I do not recommend this product
Budget Pirate
Wisconsin
Get it on Amazon vs REI - save a ton of money
4 months ago
Amazon has the same model for only $272.00, not sure why its significantly more expensive at REI. Solid product just would rather not pay $400.00
Age:18–24
Yes , I recommend this product
Kailani
Excellent water purifier!
8 months ago
The MSR Guardian Purifier has been my go-to for backpacking for the past six seasons. People often borrow it from me. It is fast and effective, so we don’t have to wait long to refill while on the go or at camp. I feel very safe drinking water in the wilderness using my MSR Guardian.
Robert F.
Phenomenal filter
9 months ago
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.
Originally posted on a Cascade Designs brand site
Donald L.
The best filter I have
9 months ago
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.***
Originally posted on a Cascade Designs brand site
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