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MSR MiniWorks EX Microfilter

4.3 out of 5 stars 370 customer reviews
| 39 answered questions

Price: $89.95 & FREE Shipping
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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
38 new from $78.95 1 used from $69.22
$89.95 & FREE Shipping In Stock. Ships from and sold by Moosejaw.

Frequently Bought Together

  • MSR MiniWorks EX Microfilter
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Total price: $100.94
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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 (370 customer reviews)
  • Amazon Best Sellers Rank: #8,217 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: -
If I could marry this thing I would. Here is my breakdown:

PROS
1. Super lightweight. I used to have the old version which was .5 lbs heavier.
2. I've never gotten sick. I use this thing all the time and sometimes with very questionable water...I mean...nasty.
3. Super easy to maintain. Get the maintenance kit. Really this thing should come with it already but it doesn't...so buy it. Super peace of mind in the field.
4. Very nice design. This thing looks cool. Some of the other MSR models and other manufacturers products look dorky. This thing looks really cool.
5. Good bang for your pump. You don't feel like you're wasting time with each pump.

Cons
1. I can't marry it.
2. The filtering element is delicate so you have to be careful. Don't let it freeze with water in it or you'll have a broken element. If that happens on the trail...you are in trouble.
3. I always have backup purification tablets just in case.

Tips
1. Get some coffee filters and rubber bands to wrap around the hose inlet. It will pre filter the water and extend the life of your filter element. A coffee filter is way cheaper than a new element.
2. In case of really nasty, wonky water...have a bottle of water purification tablets and use them properly. Also some powdered juice mix packets to help remove the purification tablet flavor if you end up using the tablets.
3. Make sure you bring that maintenance kit AND properly maintain your filter as needed. Take care of it, it will take care of you.
4. FINALLY: These things are a value at the normal price but often they go on sale so keep that in mind when you are ready to buy. As I write this (5/16/13) Amazon has this on sale for a GREAT price.

I hope you found this helpful.
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