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MSR MiniWorks EX Backcountry Water Purifier System

4.6 4.6 out of 5 stars 211 ratings

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Purchase options and add-ons

Material
Ceramic
Capacity
2000 Liters
Included Components
Filter, (50) purifier tabs, stuff sack
Purification Method
Ceramic Plus Carbon

About this item

  • Microfilter water filter pump and 50 purification tablets for hiking, backpacking, camping, travel, survival, and emergency preparedness
  • Replaceable carbon and ceramic filter removes bacteria, protozoa, organic compounds, and particulate; Aquatabs protect against viruses
  • Pumps at a rate of one liter per minute; compatible with a variety of wide mouth water bottles, and hydration bladders (sold separately)
  • Effective against viruses (99.99%), bacteria (99.9999%), and protozoa (99.9%); filter treats up to 2,000 liters of water and each tab treats 2 quarts
  • Pump measures 7.5 x 2.75 inches and weighs 1 pound; storage bag included; manufacturer’s limited lifetime warranty; made in the USA

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From the brand


From the manufacturer

MiniWorks Header

Mountain Safety Research

MSR has always been a company of engineers, inventors and unruly dreamers. Larry Penberthy started the company in 1969 on a personal crusade against unsafe equipment. Today, we’re still an intrepid team obsessed with creating the most reliable, high-performance gear possible.

Whether it’s defying the status quo in equipment design or radically shifting the social mindset, we believe the greatest innovations—and explorations—are inspired by the world’s unruly dreamers.

Photo By: Scott Rinckenberger

MiniWorks EX Purifier System

ceramic filter

MSR water Lab

Aquatabs

Better-Tasting Water

Reliable

Durable carbon/ceramic element ensures safe, taste-free water—even with frequent, heavy use.

Testing

Effective against viruses (99.99%), bacteria (99.9999%), protozoa (99.9%) and particulate. Meets U.S. EPA drinking water standards* and NSF protocol P231 testing standard.

Iodine-Free

Aquatabs tablets inactivate viruses without bad-tasting iodine. Includes 50 individually packaged tablets. Each tablet treats up to 2 quarts of water depending on conditions.

Field-maintainable

Filter can be cleaned repeatedly for full flow recovery with no tools required.

Water Lab

MSR Purifiers & Microfilters

From our fast-and-light microfilters to our gravity-powered systems, we apply the latest technologies and rigorous testing to assure you safe water on every adventure.

water lab

Safe Water Starts With Science

We invest in an on-site water lab with staff scientists, and individually test our devices to ensure they deliver greater safety and ease of use.

Every MSR filter and purifier features:

  • An integrity check that allows the user to easily confirm that, if the device is dropped or frozen, the fibers haven’t been damaged and the device is working safely—a feature most competitors don’t provide.
  • An end-of-life indicator—the filter media stops passing water. This clearly identifies that it’s time to replace the cartridge without exposing the user to harmful pathogens.
  • Passes NSF Protocol P231 throughout the filter’s life. The test confirms microbiological threat removal from a variety of water types, unlike NSF 42 and 53, which aren’t suitable tests for backcountry use.

MiniWorks Miniworks Purifier Guardian Trail Shot AutoFlow Guardian Gravity
MiniWorks EX Microfilter MiniWorks EX Purifier Guardian Purifier TrailShot Microfilter AutoFlow XL Gravity Filter Guardian Gravity Purifier
Customer Reviews
4.6 out of 5 stars
1,527
4.6 out of 5 stars
211
4.6 out of 5 stars
442
4.6 out of 5 stars
944
4.7 out of 5 stars
55
4.5 out of 5 stars
71
Weight 16 oz 16 oz 17.3 oz 5 oz 12 oz 1 lbs 3 oz
Flow Rate (Liters per Minute) 1 L/Minute 1 L/Minute 2.5 L/Minute 1 L/Minute 1.75 L/Minute 0.5 L/Minute
Cartridge Life (Liters) 2,000 Liters 2,000 Liters 10,000 Liters 2,000 Liters 1,500 Liters 3,000+ Liters
Effective Against Protozoa (ex: Giardia, Cryptosporidium)
Effective Against Bacteria (ex: E. coli, Salmonella, Cholera)
Effective Against Viruses (ex: Hepatitis A, Norwalk, Rotavirus)
Effective Against Particulates (dirt, microplastics)
Effective Against Taste/Odor
Testing Standards P248/P231 NSF P231 Testing For removal of bacteria (99.9999%) and protozoa (99.9%) from beginning to end of filter life in “worst-case” water. NSF P231 Testing For removal of bacteria (99.9999%) and protozoa (99.9%) from beginning to end of filter life in “worst-case” water. NSF P248 Testing Standard used by U.S. military for removal of viruses, bacteria (99.9999%), protozoa (99.9%), and sediment from “worst-case” water conditions. NSF P231 Testing For removal of bacteria (99.9999%) and protozoa (99.9%) from beginning to end of filter life in “worst-case” water. NSF P231 Testing For removal of bacteria (99.9999%) and protozoa (99.9%) from beginning to end of filter life in “worst-case” water. NSF P248 Testing Standard used by U.S. military for removal of viruses, bacteria (99.9999%), protozoa (99.9%), and sediment from “worst-case” water conditions.
Water Bottle Adaptor

Product Description

The MSR MiniWorks EX Microfilter Water Purifier provides proven, reliable water filtration and purification for camping and hiking, backcountry adventures, global travel, survival situations, and emergencies. The replaceable Marathon EX ceramic element removes bacteria (such as E. coli. Shigella, salmonella, cholera), protozoa (such as giardia, cryptosporidium, amoebae), and particulate, and its carbon core eliminates unpleasant tastes and odors caused by organic compounds such as iodine, chlorine, and pesticides. Also included are 50 Aquatabs, which protect against viruses (99.99% effective) when added to filtered water; each tab treats up to two quarts of water. Thanks to its innovative AirSpring Accumulator, the microfilter is capable of pumping one liter of water per minute, a flow rate that is easily maintained in the field, without any tools. The MSR MiniWorks EX Microfilter Water Purifier meets NSF protocol P231 testing standards for removal of bacteria (99.9999%) and protozoa (99.9%), throughout its replaceable filter life of 2,000 liters of water. Compatible with a wide variety of water containers such as Nalgene, Camelback, and MSR Dromedary Bags (sold separately); bottom screws on to threaded lids, or water can be pumped directly into a hydration reservoir drinking tube. Lightweight and compact, the pump measures 7.5 x 2.75 inches and weighs one pound. Includes 50 Aquatabs, and a storage bag. Manufacturer’s limited lifetime warranty. Made in the USA.

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MSR MiniWorks EX Backcountry Water Purifier System


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Customer reviews

4.6 out of 5 stars
4.6 out of 5
211 global ratings

Customers say

Customers like the performance, quality and water quality of the water purification unit. For example, they mention it works great, provides clean, drinkable water and that cleaning is a breeze.

AI-generated from the text of customer reviews

7 customers mention7 positive0 negative

Customers are satisfied with the performance of the water purification unit. They mention that it works well, is satisfactory, and is a great value. However, some customers report that the filter works well but is slow.

"Very based, worked great and was easy to use. Satisfactory." Read more

"This filter worked great on my five day trip. Pumped water out of the lake and it tasted like the water out of my reverse osmosis system at home...." Read more

"The filter seems to work great, but it’s slow. Not so bad if you’re filling a 32 oz nalgene. I tried filling a 6l bag, and it took a while...." Read more

"...Works great!" Read more

5 customers mention5 positive0 negative

Customers are satisfied with the quality of the water purification unit. They mention that it has a good filter, and it filters water well.

"...This filters water so well, you'll hate drinking most of the bottled waters out there. ......" Read more

"...We bought this one for our oldest. Best filter. It's also reasonable on price. If your looking for a manual water filter this is the one!" Read more

"Amazing product and super helpful customer service" Read more

"Good filter..." Read more

4 customers mention4 positive0 negative

Customers are satisfied with the water quality of the water purification unit. They mention that the water was fairly clean to begin with, and it provides clean, drinkable water.

"...The water was fairly clean to begin with as I got it from northern Lake Michigan. But all in all worked great." Read more

"...Screws directly onto my nalgene bottle. The water is clean and maintanence is minimal to keep the filter working...." Read more

"...Water tastes great, it packs down small, cleaning is a breeze, and it is 100% field serviceable without any tools...." Read more

"Provides clean, drinkable water. The only downside is that you have to scrub the filter every 3/4 of a gallon...." Read more

Top reviews from the United States

Reviewed in the United States on August 28, 2023
One person found this helpful
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Reviewed in the United States on September 3, 2019
17 people found this helpful
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Reviewed in the United States on May 18, 2023
4 people found this helpful
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Reviewed in the United States on July 25, 2022
6 people found this helpful
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Reviewed in the United States on March 7, 2023
One person found this helpful
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Reviewed in the United States on April 19, 2020
8 people found this helpful
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Reviewed in the United States on November 13, 2020
3 people found this helpful
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Reviewed in the United States on July 29, 2020
2 people found this helpful
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Top reviews from other countries

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Alex-Ann Auger Bélanger
5.0 out of 5 stars Recommande
Reviewed in Canada on January 18, 2021
Jocelyne Brodeur
1.0 out of 5 stars Mauvaise performance.
Reviewed in Canada on August 9, 2023
One person found this helpful
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