MSR Guardian Purifier Pump

MSR Guardian Purifier Pump

MSR Guardian Purifier Pump is rated 4.6 out of 5 by 62.
  • y_2017, m_9, d_23, h_3
  • bvseo_bulk, prod_bvrr, vn_bulk_2.0.3
  • cp_1, bvpage1
  • co_hasreviews, tv_0, tr_62
  • loc_en_US, sid_10304112, prod, sort_[SortEntry(order=FEATURED, direction=DESCENDING), SortEntry(order=SUBMISSION_TIME, direction=DESCENDING)]
  • clientName_moosejaw
4.5 Star Rating

Select a Size Select a Color

When will I get my stuff?

"In Stock" means this item is ready to ship. Orders placed before 3pm EST using Ship Speeds of 1-5 Days will ship SAME DAY. Orders using 5-10 day shipping will ship within one business day.

"Ship Date" means we'll special-order the product for you and this is the date we expect your shipment to leave our warehouse.

"Oversized" means the item is too large for 5-10 Day Shipping and can only be shipped via 4-5 Day Shipping. Additional shipping charges may apply.

"Freight" means the item is too large for 5-10 Day Shipping and must be shipped by truck freight for an additional fee. Someone must be present to accept delivery so we will call to schedule.

If you have any questions, please Live Chat one of our sort of smart customer experience personnel. If you are one of the few that enjoy speaking to real human, please call 877-666-7352

Add to Cart
+ earn up to $35.00 in Reward Dollars
Moosejaw Rewards: You earn MJ$10 for every $100 you spend on or at our shops (MJ$2.50 for discounted items).

So if you buy a $200.00 jacket on, you can use MJ$20.00 on your next order toward that sweet Moosejaw hoody you’ve been eyeballin.

You are signed up automatically when you give your email address and you’ll earn points as you shop. So easy.

For full program info, see:
Rewards Program Details
Add to Wish List
- +
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
Features: Made in USA, Self-Cleaning
Weight: 17.3 oz
Cartridge / Cycle Life: 10,000 liters
Filter Rate: 2.5 liters / minute
Length: 8.2 in.
Awards: Outside Gear Of The Show - 2016, Gear Of The Year - 2015, OutDoor Industry Telegraph - 2016, Editors Choice Summer - 2016, Backpacker Magazine Editors' Choice Award - 2016, OutDoor Industry Gold Award Winner - 2015, Innovation Award Winner Outdoor Retailer Summer - 2015, Outdoor Retailer Best of Show Award - 2015, Gear Institute Best New Gear Outdoor Retailer Summer - 2015, Gear Junkie Best In Show Outdoor Retailer Summer Award - 2015, Outside Magazine Gear of the Year Award - 2016, National Geographic Adventure Gear of the Year Award - 2015
Disclaimer: We only ship this brand to US Addresses.
Best Use: Travel, Basecamp and Expedition, Camping
Effective Against: Protozoa, Bacteria and Viruses
Filter Type: Pump
Rated 5 out of 5 by from Incredible Filter! We hike and multi-day camp a lot, and this filter allows us to cut our pack weight in half by carrying 1 bottle/person. With 4 small kids, stomach issues cannot be an issue in the backcountry, but with the Guarduan, we feel confident pumping from the grossest lakes and foot-trafficked streams: water is always clean, clear and crisp. Incredibly fast and consistent.
Date published: 2017-08-17
Rated 4 out of 5 by from Use at Philmont Scout Ranch For those of you who are looking to buy this filter for coming out on trek at Philmont, while this is a great filter, you will still have to use micropur on water that is filtered with the Guardian. I have worked as a Ranger at Philmont for 2 years and micropur is the best way of having 100% safe water. Even if you bring the Guardian you will still have to use the provided micropur. I have seen this filter in action and it works well and pumps fast. But if you are looking for a filter to use at Philmont you can probably find one that will do the job and coast less. Its a Philmont police that you have to use the micropur while on the trail no matter what your filter system is. Hope this helps you while you are looking for a filter to take on trek at Philmont. You can also make it through a trek without a filter and just using the micropur tabs.
Date published: 2017-09-17
Rated 5 out of 5 by from Expect Water Treatment Envy Fast. Easy. And full coverage of ALL the nasties. On my last weeklong hike, I never carried any water. I just used the Guardian to fill a collapsible bottle and drank what I needed at streams and lakes. Those who saw the flow rate wanted to use it instead of what they were carrying. No buyer's remorse here.
Date published: 2017-07-30
Rated 5 out of 5 by from Zero issues. Love the purifier. Some room for improvement. Have used this purifier extensively in a variety of conditions so far all with success: - Lake Michigan (where there's lots of sand suspended in the water, which clogged the pre-filter pretty easily ... it unclogged nicely). On these trips (there've been several) we used to use a competing filter that had a ceramic filter that became clogged every 2-3L of water. As I am typically pumping water for my family of 4, we can go through 10L+ in a day. It was such a pain with our old filter. The Guardian is a huge win by comparison. It never gets clogged (other than the pre-filter which I can clean myself). - Costa Rica - Nobody got sick. Is there any other measure of success? - River Trip - worked well filtering fast-moving creek water. Room for improvement: The float on the pre-filter has a tendancy to flip straight upwards so that the pre-filter is entirely out of the water. In the creek most recently I resorted to weighing down the hose with a rock. That's probably not a great solution long-term but it worked. It happens every time i use the pump and is the only annoyance. Other providers water filters suspend the pre-filter under water with a float on the hose (allowing it to sink). That seems to work much better. Overall, still a 5-star product. I'm glad I bought it. I've run several 100L through the system and it's been great the entire time.
Date published: 2017-07-19
Rated 2 out of 5 by from Does MSR have a fix for this! Upon first use in the home sink the guardian has a catastrophic failure. Followed the manual but no joy here! Please see the video attached. Waiting for a reply from Cascade Designs...........
Date published: 2017-07-14
Rated 5 out of 5 by from Excellent Expensive, but worth it. Durable, quick working, easy to pump, cleans everything.
Date published: 2017-07-03
Rated 2 out of 5 by from Fast and easy to pump. Bad water taste persists. After many liters pumped, a distinct "pool water" taste persists. If this continues, and cannot be remedied, I'll return it. Love the bottle/dromedary compatibility (main reason for purchase).
Date published: 2017-07-02
Rated 5 out of 5 by from Well, there is nothing better out there yet. Well, there is nothing better out there yet.
Date published: 2017-06-12
  • y_2017, m_9, d_23, h_3
  • bvseo_bulk, prod_bvrr, vn_bulk_2.0.3
  • cp_1, bvpage1
  • co_hasreviews, tv_0, tr_62
  • loc_en_US, sid_10304112, prod, sort_[SortEntry(order=FEATURED, direction=DESCENDING), SortEntry(order=SUBMISSION_TIME, direction=DESCENDING)]
  • clientName_moosejaw

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: 2017-09-19

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 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: 2017-04-16
  • y_2017, m_9, d_23, h_3CST
  • bvseo_bulk, prod_bvqa, vn_bulk_2.0.3
  • cp_1, bvpage1
  • co_hasquestionsanswers, tq_6
  • loc_en_US, sid_10304112, prod, sort_[SortEntry(order=NUM_ANSWERS, direction=DESCENDING)]
  • clientName_moosejaw

Free Shipping
Spend $12 in Moosejaw products OR at least $35
in other products and you orders ships FREE!

Moosejaw Rewards
You earn MJ$10 for every $100 you spend on or at our shops (MJ$2.50 for discounted items). That's like getting 10% back in Rewards!

What are you looking for?
Shopping Cart