MSR HyperFlow Microfilter

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Price: $99.95 $98.95   

Product Feature

• Microfilter utilizes Hollow Fiber Technology and advanced engineering to make water treatment highly mobile and easy to use
• Ergonomic design, diminutive size and tool-free maintainability make it just as appropriate on day trips as it is on multi-day excursions
• Filtration rate of three liters per minute; includes Quick Connect bottle adaptor, allowing direct connection to all MSR hydration products and a variety of other "wide mouth" containers
• Hollow fiber filter with 0.2-micron pores, effective against protozoa, bacteria, and particulate; three liters per minute flow and 20 strokes per liter of water
• Includes limited lifetime manufacturer's warranty; made in Seattle, WA

Product Description

MSR's lightest, smallest, and fastest pumping filter. The best choice for Fast & Light backcountry use. Effective against Protozoa, Bacteria, Particulate. Weight: 221 grams/7.8oz, Dimensions: 17.8 x 8.3 cm/7x3.5 inches, Filter Matrix: Hollow Fiber, Filter Pore Size: 0.2 Micron. Cartridge life is 1000 liters.

MSR HyperFlow Microfilter Review

(Read my review update at the bottom)

(Read my review update at the bottom)

I'm trying to love this filter. It takes patience and practice to get this filter to work without frustration, the pay off is a very light filter that filters water fast.

If you have done any research on this filter you have come across a list of complaints. I've had similar performance issues as other reviewers but I've learned that every complaint but two are from user error. The pump is a bit finicky and it's tough to learn how to use perfectly with a little piece of paper as your guide. If you had a friend next to you with the same filter that knew how to use it properly then you could learn all the details to trouble free use without frustration.

Most filters you pump until they stop flowing well then you wipe the filter element down and start pumping again no instruction necessary (sort of). This leads to the first of the only 2 legitimate complaints, 1) the Hyperflow is kind of a pain in the butt to clean compared to other filters, and 2) you must protect the filter from freezing. I've had to wake up in the middle of the night more than once and stick the filter in my sleeping bag because I forgot to do it before I went to bed.

Once you purchase this filter I recommend filtering and back flushing the cartridge at least 5 times standing in front of the kitchen sink to get the hang of it. I use a pot of water to draw from so I do not have the hose flopping around in the kitchen. If you try to learn this in the field you will be very frustrated and nobody will want to be near you for an hour or two. The #1 thing you need to know when back flushing the filter is it MUST be wet, this filter hates air, so pump some water into it before you reverse the valves, if you try this when it's dry it will lock up and you will be tempted to smash it with a hammer.

I like the Nalgene/MSR compatible cap for the filter however the down side is you either have to hold everything up in the air and pump with the weigh of the water flopping around or you have to squat on the ground precariously close to the stream while you steady your bladder with one hand and pump with the other. This is fine for a liter but if you are at camp pumping water for dinner and breakfast it's very uncomfortable. I recommend getting a couple feet of tubing just like the one attached to the prefilter and use it to fill whatever container you want to fill, this allows you freedom of movement and greater flexibility of containers to fill. Plus the included cap can be hard to open.

Here's my recommendation:
If you want fast and light and can deal with learning and dealing with extra steps get the MSR Hyperflow.
If you want easy maintenance and high reliability and don't care much about weight get the MSR Miniworks
If you can't decide which of the top 2 you want get the MSR Sweatwater.

Update: Last week on a backpacking trip my pump failed after 1 liter of water and filter cartridge had only been used 3 times. After a few strokes the pump became harder and harder to pump until it completely locked up. I back flushed the pump a few times but for some odd reason it did not help. My wife and I had to abandon our multi day trip and hike back to the car so needless to say I can no longer recommend this pump. Buy the MSR mini works I've had one 15 years and its never let me down.

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