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MSR HyperFlow Water Filter

    MSR HyperFlow Water Filter

    You'll be blown away by how fast you can fill a water bottle with the MSR HyperFlow™ water filter.

    • $99.95

    Item # 767564

    REI Members get back an estimated $ 10.00 on this item as part of their annual member refund.

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    • Backpacker April '08: ''The HyperFlow is so fast and light it converted several editors who had sworn off filters in favor of chemical treatment.''
    • Hollow fiber technology offers an extremely high flow rate of 2.75 liters per minute
    • At just 7.8 oz., the HyperFlow is the lightest, most compact pump filter created by MSR
    • Filter physically removes particles, protozoa, and bacteria down to 0.2 microns in size, including giardia, salmonella, cryptosporidia and others
    • Pump is fully field maintainable and does not require tools for complete disassembly
    • Included Quick-Connect™ bottle cap interfaces with MSR hydration products, Nalgene bottles and other containers with 63mm threaded openings
    • Quick-Connect™ cap allows the pump to attach directly to the bottle or hydration bladder for the most convenient filling
    • Included prefilter attaches to the end of the intake hose and blocks larger contaminants from entering the microfilter
    • Prefilter floats near the surface of the water to avoid intake of contaminants located at the floor of your water source
    • Over-molded end caps on the pump provide an excellent grip and pumping comfort
    • Adapt the HyperFlow pump into a pump-free gravity filter with the HyperFlow Gravity kit, sold separately

    MSR has identified and fixed a flow rate issue affecting some cartridges in MSR HyperFlow microfilters. As of February 11, 2009, all filter cartridges sold by REI perform to flow specifications.

    Please note: MSR products can only be shipped to U.S. addresses.

    Made in USA.

    Item 767564

    REI Membership

    Related items

    MSR HyperFlow Water Filter Specs
    Best use
    Hollow fibers
    Protozoa and bacteria
    3 liters per minute
    ABS plastic
    7 x 3.5 inches
    7.8 ounces
    Filter type
    Filter medium
    Pump force
    Pump strokes per liter
    Housing material
    Field cleanable

    MSR HyperFlow Water Filter

    Loading Ratings & Reviews...

    Rated 3.1184/5 based on 152 reviews
    Rated 1out of5
    by fromIt's tempting but don't do it! This pump has promise. A lot of us thought it was the long awaited replacement to th PUR/katahdin Hiker that's been around for 20 years. It works as advertised for the first 5 or 6 liters. Then you need to back flush and the filter is clogged and it won't back flush. It happened with my first filter and a replacement, both of which were purchased after the filter element recalls that we're supposed to fix the problem. Bottom line don't bother with this pump until MSR fixes the filter element issue.
    Date published: 2014-01-18
    Rated 1out of5
    by fromDefective ! I too was lured into the glowing early recommendations. Today, preparing for our backpack trip to the Sierra , we tested the Hyperflow out in the kitchen sink. Yes, great flow rate. Ok, on to the test of the back flush feature. The cylinder was impossible to remove to change the direction of the inner valve because the "locking" feature did not properly seat so the cylinder could be twisted. I agree with another comment from someone who said this was a serious defect. Considering that the back flush maintenance is recommended for every 8 liters pumped, it seems that this procedure should work, and work well. I'm glad I was not out in the backcountry and had to rely on it. I'm taking it back to REI and packing my reliable Miniworks.
    Date published: 2008-07-12
    Rated 1out of5
    by fromGood Size, but disappointing I do quite a bit of backpacking with the Boy Scouts and tried this filter. Thought it should be perfect with the large prefilter, over-all size and the flow rate. The following make this a poor choice for me: 1: Prefilter floats around in the water and often will float to the surface and suck air unless you find a rock towieght it down. 2: The "clean end" (when not in use) is protected by a small cap. This cap could be very easy to lose if you're not (or your scout) is not carefull. 3: The one-way valves on the inside seem to be flimsy and self invert if you pump too hard which slows the process down greatly and is very frustration. 4: Pump seems to work the best if held horizontally, though I have never been able to get water chamber more than 3/4 full, thus making every stroke ineffective to some degree. This is not a user friendly or fast pump for scouts / youth. I think if MSR could beef-up their one way valves, this could be a do-able filter for adults and if they could secure the cap for the clean side to the filter body so it's less likely to loose it would be better for the scouts. I'm planning on returning it and keep looking for a lighter option to the First Need which has been great
    Date published: 2008-07-14
    Rated 1out of5
    by fromBack to the drawing board! I agree the Hyperflow doesn't live up to its hype. On its first field use, a six-day Ansel Adams Wilderness backpack, the Hyperflow started out hyper-flowing but quickly became difficult to pump, and no amount of backflushing or other tinkering would cure the problem. It soon reached the point that my old, slow Miniworks would have outperformed the Hyperflow with the added bonus of being easy to clean and maintain. We ended up reverting to my buddy's Steripen and, when that failed, reliable but unpleasant chemicals. I've another six day backpack coming up and the Hyperflow will stay behind. . .probably at REI, where I plan to return it.
    Date published: 2008-07-30
    Rated 1out of5
    by frompoor performer I initially used this on a 3 day trip in Tuolumne Meadows - it pumped very easily, and quickly. No backflushing needed. I was happy. Then we took it on a 7 day backpacking trip in the Sierras. After day 1 it became harder and harder to pump, as someone else said, a gym workout. This, despite backflushing. Ultimately backflushing also proved impossible. We read and reread directions, took care to have no air locks, but to no avail. We also found that the prefilter floats upside down unless anchored by a rock or foot somehow, and the intake hose falls off occasionally. I am returning this as soon as I can get to the store. Very disappointing.
    Date published: 2008-08-15
    Rated 1out of5
    by fromFollow-up to previous review When I first got this filter I went on a short trip and tried it out. It worked perfectly and I loved it. When we set out on the JMT, I found it became harder and harder to pump and, despite careful back-flushing, it eventually became impossible to operate. Eventually it wouldn't back-flush either and left us in a serious 'thirst' situation. We had Micro-Pur but not enough for the whole trip and had to bail the trail. I will return this filter and stick with my older, more reliable Sweetwater. Very disappointing!
    Date published: 2008-08-23
    Rated 1out of5
    by fromMore hype than flow I used this filter for 13 days in Montana, 5 day hikes and twice for 4 day backpack trips. At first, it was the best and fastest filter I have ever used (other FirstNeed, MSR Waterworks). I backflushed after every 8-10 liters. However, after filtering about 80 liters from snow melt streams, it started to be hard to pump, a real workout. No amount of backflushing cured the problem. The filtration rate decreased dramatically. Unless MSR devises a better cleaning method, this filter can easily leave you stranded. I can't imagine how fast it would clog in dirtier water.
    Date published: 2008-08-26
    Rated 1out of5
    by fromWon't Pump I recently bought this filter & tried it at home. I practiced filtering several liters of tap water, which worked fine. Then I tried backflushing, which worked fine at first. But then it stopped working even with rather strong pumping. Maybe somehow the hollow fiber filter got damaged.
    Date published: 2008-09-06

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