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MSR MiniWorks EX Microfilter

4.3 out of 5 stars 382 customer reviews
| 40 answered questions

List Price: $89.95
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  • Durable carbon/ceramic element ensures safe, taste-free water-even with frequent, heavy use.
  • Can be cleaned repeatedly for full filter recovery with no tools required.
  • AirSpring Accumulator increases filtration speed; up to 1-liter per minute.
  • Carbon core removes unpleasant tastes and odors caused by organic compounds, such as iodine, chlorine, and pesticides.
  • Effective against protozoa, bacteria, chemicals/toxins, and particulate
31 new from $64.95 2 used from $58.46
$64.95 & FREE Shipping. Details In stock but may require an extra 1-2 days to process. Ships from and sold by Amazon.com. Gift-wrap available.

Frequently Bought Together

  • MSR MiniWorks EX Microfilter
  • +
  • Nalgene Tritan Wide Mouth BPA-Free Water Bottle, 1-Quart
Total price: $73.95
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Technical Details


Product Description

Engineered for frequent and heavy use, this filter gets the job done and then some. It's field maintainable, easy to be cleaned repeatedly without the use of tools. An AirSpring Accumulator boosts purification speed to make this one fantastic water filter.

Product Details

  • Product Dimensions: 7 x 10 x 4 inches ; 1.8 pounds
  • Shipping Weight: 1.8 pounds (View shipping rates and policies)
  • ASIN: B002IAOOMA
  • Item model number: MSR
  • Average Customer Review: 4.3 out of 5 stars  See all reviews (382 customer reviews)
  • Amazon Best Sellers Rank: #3,804 in Sports & Outdoors (See Top 100 in Sports & Outdoors)
  • Product Warranty: For warranty information about this product, please click here

Customer Questions & Answers

Customer Reviews

Top Customer Reviews

Size: One SizeColor: - Verified Purchase
I researched filtration systems for almost a month before settling on the MSR miniworks. I figured I could just go pick one up at the local Cabela's or REI, but BOTH retail stores were sold out of these, while there was still a good supply of the other MSR and Katadyn filter systems on the shelf. I took this as a sign that this is the filter to have and ordered it from Amazon, and it has been worth every penny. Read on....

In Camp:
The filter is very simple to use and has a good output-per-pump ratio. You never really feel like you are doing more work than you should for the amount of water you are pushing through, especially if you take into account the fact that every pump is worth about one gulp of nasty water that you WON'T have to drink. If you do see a diminished output, simply unscrew the filter housing and give the element a light scrubbing. We were taking water from a brown lake that is loaded with tannins and we would get about 2 litres through (about 2 full-size nalgene bottles worth) before we noticed the filter could use a cleaning. Tannin-loaded water is supposedly some of the worst for clogging these ceramic filters, so if you have cleaner water sources at your site than we do, your element-cleaning cycles should be farther apart. The water came out crystal-clear and almost tasteless. It didn't taste like Dasani bottled water, but it definitely didn't taste like tea-colored lake water either. Pretty much neutral. More importantly, it tasted CLEAN and nobody got sick. Also, the MSR Miniworks requires no chemical additives but still claims to filter everything but viruses. The chance of contracting a waterborne virus from a U.S.
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Size: One SizeColor: -
This is a great filter, I've it used on many hiking trips. It pumps fast which is great when filtering for more than one person, though at 16 oz. it is not the lightest filter on the market but it's design makes it very field maintainable. The MiniWorks has one annoying weakness that can leave you in a world of hurt when deep in the wilderness. The ceramic filter element is very fragile, I have broken two with no trouble at all. At $35.00 to $40.00 a pop to replace, it is something to keep in mind, be very careful when cleaning the element.
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Size: One SizeColor: - Verified Purchase
I use this water purifier while backpacking in the western US. I think there are different strategies to purifying water from doing nothing to adding chemicals etc. There is evidence that waters in the Sierra Nevadas that come out of glaciers are probably not contaminated. But the only way to prove that is by testing or making certain that there is nothing between you and the source of the water. For me, safety matters. I don't want to be losing water and calories while my intestinal tract runs amok, so I purify water. I don't like the taste of chemical treatments like iodine and chlorine, which may not work if not done right. Boiling water takes too much time, and if you need to stock up on several liters in a dry area, you may not be able to boil enough. That's why I chose a filtration system. And I looked over every brand and model, and chose the MSR MiniWorks based on the following:

1. It is lightweight (I used to have a Katadyn, which is built and weighs like a rock), so it's not going to add too much to your pack. It's heavier than chemicals or some of the UV systems, but it's not bad. It comes in a nice little mesh bag, so you can stuff it into a corner of your pack.

2. It has a 0.45µ filter, which removes 99% of bacteria, and probably 99.999% of parasites (like giardia). It does NOT remove viruses, but unless you're in a crowded city without a good sewage system, I probably wouldn't worry about it. MSR makes a filtration system that adds chlorine, but for a North American or European trip, not worth it.

3. The bottom of the device fits onto standard wide mouth Nalgene bottles and canteens. I have several 3L canteens that I can fill in 2-3 minutes. It makes it easy, reduces spillage, and just is cool.

4.
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Size: One SizeColor: -
The MSR MiniWorks is a fantastic water filter. I've used it while camping and hiking in the wild, as well as in the US Army with some really funky water from old pipes.

While it doesn't remove all the bad taste of the funky water, it certainly removes harmful bacterial, cysts, and protozoa. I don't believe it's rated to remove viruses, but boiling certainly will. I've used it in clear and cloudy lakes, rivers, and streams and haven't gotten sick. Definitely worth the money.
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Size: One SizeColor: -
I just returned from a year-long trip that took me around the jungles and beaches of Papua New Guinea, and this product was part of my pack. Thank goodness I brought a few water filtration backups and was able to switch to something else.

In the hot and humid jungles of PNG it was important to stay hydrated, so I was going through 3-4 Nalgenes worth of water each day. I gave this filter a shot thinking it would pack well and be heavy duty enough to keep any contaminant at bay. Well, the filter must be heavy duty because it took about 15 minutes of constant pumping to get 1L of water from the river into my bottle. Now imagine doing that over and over, day after day. I checked the unit over and over hoping to clear up some kind of blockage, but I think that the flow rate is just that slow.

I ended up switching to a particulate filter (http://amzn.com/B002GQZDJE) and a steripen (http://amzn.com/B00BCI3QOQ) to get the job done in a fraction of the time. You'll need the filter to keep any particulates from getting in the water, and then the steripen will kill off anything microbial that remains in your h2o. It kept me healthy for a year when I was regularly drinking water from rivers and streams that were far from sanitary.

I'll take Steripen over MSR anyday!
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