HyperFlow™ Microfilter

  • MSR HyperFlow™ Microfilter
  • HyperFlow™ Microfilter
  • HyperFlow™ Microfilter
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MSR

HyperFlow™ Microfilter

$159.95
$159.95
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Protection

It will change the way you travel in the backcountry.
  • Testing: Meets NSF protocol P231 for removal of bacteria (99.9999%) and protozoa (99.9%) from beginning to end of filter life in “worst-case” water.
  • High Flow Rate: Pumps more than 3 liters per minute or one liter every 20 strokes.
  • Ultralight: Just 7.8 oz. (221 g).
  • Ultra-small: Just 7x3.5 in. ( 17.8 x 8.3 cm) makes it easy to take along even when space is at a premium.
  • Field-Maintainable: Can be cleaned repeatedly for flow recovery without tools.
  • Super Convenient: Quick Connect bottle adapter lets you filter water directly into a variety of containers, including all MSR hydration products and other wide-mouth containers
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Description

The HyperFlow microfilter utilizes the latest Hollow Fiber Technology and our most advanced engineering to make water treatment so small and so easy to use, it will change the way you travel in the backcountry. Its ergonomic design, diminutive size and tool-free maintainability make it just as appropriate on day trips as it is on multi-day excursions. Add a filtration rate of 3-liters per minute and you’ve got the most efficient microfilter ever created. Also included is a Quick Connect bottle adaptor—allowing direct connection to all MSR® hydration products and a variety of other "wide mouth" containers—and an advanced prefilter to prolong the life of your filter.

Tech Specs

Weight:
7.8 oz (0.22 kg)
Dimensions:
3.5 x 7 x 3 in (8.3 x 17.8 x — cm)
Effective against bacteria:
Yes
Effective against chemicals/toxins:
No
Effective against particulate:
Yes
Effective against protozoa:
Yes
Effective against viruses:
No
Filter Media:
Hollow Fiber
Filter Pore Size (microns):
0.2
Flow Rate:
3 liters per min
Strokes per Liter:
20
Cartridge Life:
~1000 liters
Field Cleanable:
Yes
Field Maintainable:
Yes
Water Bottle Adapter:
Yes
Cartridge Replacement Indicator:
No
Material(s):
Hollow Fiber
Country of Origin:
Made in the U.S.A. of U.S. and Imported Materials
SKU:
14008

Video Gallery

FAQs and Documents

What is Hollow Fiber technology?

Hollow fiber is the filtration media used in both the HyperFlow™ Microfilter and the AutoFlow™ Gravity System. Commonly used in areas such as municipal water filtration systems and medical applications, this technology is ideally suited to the outdoor market.To understand how hollow fibers work, think of a straw with permeable walls. Water is forced through the walls (filtered) and clean water flows out through the center channel. The real advantage comes when a cluster of hollow fiber straws is used, offering a dramatic increase in the amount of surface area available for filtration when compared with any other type of filter media. The benefits are much higher flow rates and a far lighter, more compact system.

How effective are hollow fibers?

Our system meets the EPA Guide Standard for the Removal of Bacteria and Protozoa. The pore size of the media is 0.2 microns.

The prefilter on my HyperFlow won’t lie flat. What can I do?

This can happen from tightly winding the hose around your filter for storage. To get the twists out of the hose, simply pull straight out to stretch it. You can also pinch the hose at one end and slide your fingers all the way down to the other end, allowing any coils to unwind on the way.

Why Backflush?

You must backflush regularly to maintain optimal performance of the filter cartridge. This is especially true in murky or very silty water. Since hollow fiber is not a depth-based media like ceramics, you don’t clean by removing clogged material from the exterior of the filter media. Instead, you must rinse the particulate that collects on the outside of the Hollow Fiber membranes. Infrequent backflushing makes the particulate harder to remove and more difficult to restore the media’s flow capacity. We recommend backflushing anywhere from every 8 liters to after each use, depending on water quality. The more you backflush, the better your flow performance and the longer life you can expect from your filter cartridge.

How do I backflush?

Click here for a video demonstration. Before leaving for the field give it a couple practice runs at home.

If you do air lock the filter cartridge, you will just need to reverse the check valves to their forward flow orientation, and pump water forward through the pump a couple of times. You have not damaged the fibers by air locking the filter.

I am having trouble backflushing. I pull back on the pump and no water comes through into the pump cylinder.

The most common problem with backflushing is getting air-lock in the filter cartridge. This can be avoided by ensuring that there is ONLY water (no air) present at the Pump Outlet. Read through the instructions for backflushing and check out the instructional video for assistance.

My filter clogged very quickly in the silty water I’m filtering. Is there anything I can do to extend the life of my filter?

Silty Water

Filtering very silty water can shorten the life of any filter. Here are some pointers to help minimize the effect of silt on your HyperFlow™:
  • Collect water in a pot or other vessel and allow the silt to settle out prior to filtering.
  • Strain water with a bandana or large coffee filter prior to filtering.
  • Use the Sweetwater® SiltStopper™ prefilter in conjunction with the pump. This will help trap silt particles before they hit the biological microfilter. This will reduce flow rates, but help prolong the life of your cartridge in challenging environments. (We recently updated the SiltStopper prefilter to accommodate the larger tube size of the HyperFlow microfilter. Earlier versions may need a zip tie to make sure the tubing stays attached firmly.)
Tea-colored (Tannic) water

This color of water typically comes from a high concentration of decaying vegetation adjacent to, or in, streams and lakes, resulting in a variety of organic acids. These include, but are not limited to, tannic, fulvic, and humic acids. These acids and the accompanying water conditions are very hard on ALL types of water filters.

Get your water elsewhere if you can. However, if no alternative exists and you are predominantly filtering these waters, we recommend using an MSR® MiniWorks® EX filter. Its ceramic element will collect all these impurities in its outer-most layer, allowing you to scrub away the clogged portion to restore normal flow rates. If you must use a HyperFlow filter, backflushing frequently will help to minimize the effect of these impurities. When you return home, add 2 drops of unscented household bleach to one liter of water and backflush this solution through the filter. This will help to break up organics that might be clogging the filter and provide the recommended treatment of your system for long-term storage.

Limited use in these conditions will not have a dramatic effect, but extended use can permanently impair hollow fiber media.

I’ve heard there were issues with some early versions of the HyperFlow. Have they been resolved?

In early 2008, we identified a flow performance issue with some of the first hollow fiber filter cartridges shipped with MSR HyperFlow microfilters. The performance issue did not affect the product’s ability to filter safe drinking water but could be frustrating, as the flow rate of some filters did not perform to product specifications. We have rectified the issue and all HyperFlow filter cartridges produced after January 2008 perform to flow specifications.

Are there any long-term storage recommendations?

When storing your filter for extended periods– essentially any time longer than two weeks, we recommend mixing 2 drops of household bleach (no fragrances or dyes) with 1 liter of water and pumping this mixture through the filter. This will help prevent the formation of biofilm (algae growth) which will reduce flow rates. Do not use more than recommended amounts of bleach. High levels of bleach can damage fibers.

What about freezing?

Once you have used your HyperFlow and wet the Hollow Fiber filter media, the fibers will remain wet for a very long time. Therefore, it is important to prevent it from freezing which can permanently damage the filter media. If you are traveling in areas where you are expecting freezing or near freezing temperatures, bring the filter into your tent - or even your sleeping bag if freezing is a definite concern. The Cleanside cover is watertight and will prevent any leakage wherever you store it. If you think your filter may be damaged from freezing, perform a Filter Test before the next use.

What if the filter takes a hard drop?

The casing of the pump is designed to protect the Filter Cartridge from most drops, but direct drops onto cement (or similarly hard surfaces) and any drops above 4 feet (1.2 m) should be avoided. If a Filter Cartridge outside the pump housing is ever dropped after being wetted, you should replace the Filter Cartridge. (We don’t recommend removing the Filter Cartridge from the protective pump housing except to replace the Filter Cartridge.) If you think your filter may have been damaged from a drop, perform a Filter Test before the next use.

Can I tell if I’ve damaged the hollow fibers?

Yes, you can, but not just by looking at the Filter Cartridge. If you have experienced a hard drop or may be concerned that your pump has frozen, there is a Filter Test Guide that came with your system. This includes instructions for checking the integrity of your filter. Also, please view this informational video about checking filter integrity. Essentially you’ll be intentionally air-locking your filter to prove the integrity of the hollow fibers. In preparation you need to make sure that your filter is fully wetted out. This means that you should have pumped several liters of water before performing this test. Generally your filter cartridge will not dry much during storage, so as long as you have used the pump a few times, you should be in good shape.

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We Believe in What We Build

At MSR, we take pride in engineering the highest-quality outdoor gear available, and we stand behind everything we make. MSR gear is built to be exceptionally durable and easily repaired. And we back it up with the best service in the industry, all to keep your gear performing for you—and out of landfills. Visit our MSR warranty page for more info.

Portrait of our repair shop crew

Overall rating: 3.8939395 / 5 from 66 reviews.

AI Generated Review Summary

The HyperFlow™ Microfilter is praised for its easy-to-use water filter that provides fresh clean water for backcountry cooking. While the pump has mixed reviews, the filter is highly recommended by many customers.

Summary topics

  • Water Filtration: 20%
  • Filter Quality: 42%

Review topics: ["weight","bag","design","problem","setup","works","filter","water","pump","backflushing","adapter","use","light","bottle","cap","trips","cleaning","system","liter","cooking","hyperflow","flow","life","buy","process"].

Review highlights

  • "Clean fresh water is now available any time." — Pinetreeslim
  • "It is small, lightweight, and is able to filter water relatively quickly." — Bryan
  • "Fantastic product, been searching for a portable filter with these features for several years." — Pinetreeslim

Reviews

Hyperflow used as inline and gravity filter

"I have been using the hyperflow for many years now and it is a really great filter. I used the sawyer squeeze previously as an inline filter when I was solo. I now use the hyperflow as an inline, gravity, and to pump water from one bag to another for multiple people. It works about as well as the sawyer for the inline part, but so much better for a gravity filter. Hang it, give it a few pumps and it goes so fast! The fact that you can completely take it apart makes it so much easier to clean and it maintains great flow over the years. My idea for a new filter is to have the same pump system as the hyperflow and be designed as an inline filter."

— Andy M. (5/5)

Seems to work fine. I'm

"Seems to work fine. I'm off on a backpacking trip today so I'm hopeful it will not fail me!"

— Sandra B. (5/5)

some parts are fragile but

"some parts are fragile but the filter is very convenient"

— Jennifer K. (4/5)

Quick and lighte

"When I know my water needs are not great I like bringing this because it is quick and light. Even"

— Mathew K. (4/5)

Cracked

"Very much disappointed by this filter, practically brand new and the plastic cracked, and now it no longer works. We were quite surprised as we had heard great things about it."

— Joanette L. (1/5)

Hint for pumping

"Hint: when the chamber fills with water, there is always some air in it. Only push to pump water out until just before the air, ie: do not push bubble of air thru. So I tip the filter down toward the bottle and it works well. The filter does not like pumping air. This works well."

— Jim (5/5)

Great water filter.

"I bought this filter after a lot of research. It won in my opinion for a couple of reasons, 1. you can replace the filter and instead of just using for a year or two my wife and I have been using this filter for ten years now. We had to buy replacement filters but with proper care, MSR has videos for how to do you it, you can really get your money's worth. 2. It has stood the test of time and that is not that common anymore. Does this mean it's perfect, no. It can be a bit cumbersome to pump into a bottle. I also believe that the new design with the lid for a Nalgene bottle is an excellent addition. However, this is not practical for all senes some don't use these bottle. Overall it is a great filter and I would reamend it. 3. it work great for two people or a group!"

— Reuben A. (4/5)

Light, small and pumps well.

"Light, small and pumps well."

— Robert F. (5/5)

The future of H2O

"Never worry about water again with this ultralight marvel!"

— Kyle H. (5/5)

Water Filter Ritual

"Hyper Flow Microfilter I just used my new Hyper flow Microfilter for a four night backprack trip in the Olympic National Park. It work effortlessly for me each day. I store it in the brain of my pack for easy access. After each use it fits compactly in the small bag it comes with. I actually look forward to the ritual of sitting by a mountain stream, river or lake and filtering water with the Hyper flow Microfilter. Thank you very, very much for this handy filter."

— Mary R. (5/5)

Q&A