REASONS TO BUY
Super fast pumping speed
Lightweight design
Ergonomic shape
Good water quality
Great value
REASONS TO AVOID
Backflushing setup takes long
Lots of backflushing required to maintain performance
MSR Hyperflow Microfilter Review
This is the fastest and lightest pump filter we've come across over the years
Credit: Backcountry
Our Verdict
Enjoy the fast flow and lightweight design of the MSR Hyperflow Microfilter. If you love to fish, canoe, hike, and explore around clear water sources with a light pack, this reliable pump filter may be a great addition to your kit. While it can't filter out viruses, it offers protection from nasty contaminants that can make you sick in most places in North America. It offers an incredibly fast pumping speed that'll leave your arms fresh and without lactic acid build-up. Collect 1 liter of water in under 30 seconds. While it does require regular backflushing (which is a pain) and doesn't do the best in turbid water, it offers easy and field-maintainable functionality that any wayward explorer needs.
Compare to Similar Products
 This Product
MSR Hyperflow Microfilter | |||||
|---|---|---|---|---|---|
| Awards |  Best Overall Filter for Personal Use |  Best Collapsible Bottle Filter | Best Overall Filter for Group Use |  Best Bang for the Buck | |
| Price | $150 List $113.00 at Amazon | $43.95 at REI Compare at 2 sellers | $55.00 at REI Compare at 3 sellers | $134.95 at REI Compare at 3 sellers | $12.85 at Amazon Compare at 2 sellers |
Overall Score  |
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| Star Rating | |||||
| Bottom Line | This reliable hand pump filter is lightweight and quick to fill a liter | A solid option for personal filtration usage during fast and light backcountry missions | Our favorite collapsible soft bottle filter, thanks to a durable design that's consistent and easy to use | A low maintenance, easy-to-use gravity filter that works well for everybody on the trail | The best chemical treatment option that will kill all pathogens when given enough time |
| Rating Categories | MSR Hyperflow Micro... | LifeStraw Peak Squeeze | Hydrapak Flux 1.5L | Platypus GravityWorks | Aquamira Water Trea... |
| Water Quality (20%) | |||||
| Durability & Maintenance (20%) | |||||
| Treatment Time (15%) | |||||
| Weight & Packability (15%) | |||||
| Ease of Set Up (15%) | |||||
| Ease of Filtration (15%) | |||||
| Specifications | MSR Hyperflow Micro... | LifeStraw Peak Squeeze | Hydrapak Flux 1.5L | Platypus GravityWorks | Aquamira Water Trea... |
| Measured Weight (entire kit) | 10.6 oz | 3.8 oz | 5.0 oz | 11.5 oz | 3.0 oz |
| Removes Particulates (sediment, microplastics) | Yes | Yes | Yes | Yes | No |
| Effective Against Viruses | No | No | No | No | Yes |
| Effective Against Chemicals | No | No | No | No | No |
| Effective Against Heavy Metals | No | No | No | No | No |
| Effective Against Bacteria | Yes | Yes | Yes | Yes | Yes |
| Effective Against Protozoa (Giardia, Cryptosporidium) | Yes | Yes | Yes | Yes | Yes |
| Type of Filter/Purifier | Hand pump | Squeeze | Squeeze, in-line, on-the-go | Gravity filter | Chemical treatment |
| Filter Media or Active Ingredient | Hollow fiber | Hollow-core membrane microfilter | Hollow fiber | Hollow fiber | Chlorine dioxide |
| Filter Pore Size (Advertised) | 0.2 microns | 0.2 microns | 0.2 micron | 0.2 microns | N/A |
| Number of Liters/Gallons per Lifetime (Advertised) | 1,000 L / 264 gal | 2,000 L / 500 gal | 1,500 L / 396 gal | 1,500 L / 396 gal | 114 L / 30 gal (per package) |
Our Analysis and Test Results
The MSR Hyperflow hand pump is the one you should choose if you don't want to work your pumping arm too hard. The super fast flow is reminiscent of a Super Soaker, filling up 1 liter of water in just over 30 seconds! It offers reliable performance for a great value and is lightweight for a hand pump filtration system.
Jack the dog and our main tester enjoy some freshwater in the Gunnison Gorge. Pumping water for this 4L reservoir takes only a couple of minutes, and we've still got muscle for pushups next to the campfire.
Credit: Amber King
Water Quality
Like most pump filters, this one is suited for use in North America, where water-borne viruses aren't usually a major concern. The filter cartridge is a hollow fiber design without any activated carbon. It can remove sediment, microplastics, protozoa, and bacteria. If you're traveling to a foreign country where you might be exposed to viruses, add some additional purification tablets to your water.
Dan Sandberg uses the MSR Hyperflow to fill a 4 liter MSR DromLite, which screws directly onto the filter. Pacific Crest Trail, High Sierra, California.
Credit: Max Neale
Durability & Maintenance
The unit is a bit of a pain to use for long periods. It seems well constructed, and after two months of use at home and in the field, it's done a good job (so far). During our water pumping tests, this filter hardly worked in our sludge concoction, while others could at least pump a liter before cleaning.
A look at all parts you need to unscrew for maintenance. Make sure you don't lose those valves!
Credit: Amber King
Many online users have also noted that consistent backflushing is required to ensure performance, especially in turbid water. In our clear water tests, we pumped over 40 liters and noticed a small performance decrease in this very clear water. But when any sediment is introduced, pumping becomes much harder.
These are both loaded in the “filter” positions.
Credit: Amber King
The filter itself is not one you can scrub but has to be back-washed — a lot! The process isn't simple either. We tried to figure it out without watching a YouTube video and failed, accidentally pulling air through the chamber when we weren't supposed to. If you do buy this, make sure you practice this process before going into the backcountry.
A look at all the components for the HyperFlow. The whole system is quite durable, small, and lightweight.
Credit: Amber King
We recommend following the manufacturer's guidance on properly backflushing the filter. We took the time to backflush numerous times and found the process laborious. We resented it, especially when surrounded by other pump filters that offered much easier maintenance.
Since this filter requires a lot of maintenance with water that isn't clear, make sure you're prefiltering water sources and taking water from only the upper columns to avoid sediment build-up. While it's easy to pump and fast, the maintenance is questionable. The filter cartridge is supposed to last at least 1,000 liters, but many online users who have had this product in hand for years are skeptical about this metric.
Treatment Time
You'll have a full liter of water after 29 pumps and 28 seconds (on average). Compared to the hand pump competition, it's one of the fastest we've ever tested. We tested this time while pumping clear water. In turbid water, treatment time decreases.
When testing it out at the sink...for 40 liters...we learned quickly that It took half a minute to get a full liter of water. Awesome!
Credit: Amber King
Our sludge bath is the ultimate test. The first few liters were easy, getting one liter in about 38 seconds and 26 pumps (on average). The pump took longer to fill as the prefilter had to work hard to remove the sediment. However, after this, it required backflushing. Even after the backflush technique recommended by MSR, it could only pull a liter in 48 seconds with 24 pumps. Overall, it does really, really fast work in clear water but struggles with turbidity. However, it offers the fastest time in optimal conditions of all the pump filters.
Weight & Packability
Not only is this filter super fast for pumping, but it's also lightweight. It weighs 10.6 oz and takes up very little space in any backpack. It has a mesh bag that easily fits all components and doesn't hold water after use. Overall, a good choice if you're seeking a light and packable hand pump filter.
Super light and packs down to a small size!
Credit: Amber King
Ease of Set Up
The setup is pretty simple, especially if you already have a Nalgene top bottle. Simple screw on the attachment to your bottle and place the prefilter float in the water source of your choice. You can keep all the tubes attached for easy assembly and use. Before pumping, find a comfortable and scenic place to sit.
While the setup is pretty simple, we recommend finding a comfy spot before you start to filter.
Ease of Use
The pumping action is quite easy. Even after 40 liters of water in one sitting, our arms were left with some energy. This pump is much easier to use than most, which is a relief. The only real issue we had was with the float of the prefilter flipping upside down.
The handle and system are small and quite ergonomic. We didn't find it uncomfortable, but easy to use.
Credit: Amber King
It has a velcro strap built into the construction that keeps everything nicely in place if you place it higher up around the tubing. Otherwise, it flips over and gets stuck. Remove the prefilter in clear water sources if you need to collect water from cracks and crevices. When you're done, pump out the water, open it up, dry it, and store it.
The float keeping the intake off the bottom of the lake, which helps to keep the filter clear.
Credit: Amber King
Should You Buy the MSR HyperFlow Microfilter?
The MSR Hyperflow is available for an average price with a filter lifespan lasting 1,000 liters. Of all the hand pump filters, it has the lowest lifespan, but the replacement filter itself isn't as expensive as others. If you're seeking a high-value, high-output hand pump that is lightweight, you'll find the value in this product.
Enjoy the fast pumping action of this lightweight hand pump in any front or backcountry setting.
Credit: Amber King
What Other Backpacking Water Filters Should You Consider?
The MSR Hyperflow has a few caveats but stands out for its lightweight design and super high water output. If you're willing to deal with backflushing and typically stick to clean water sources, it is a reliable option that you can trust in the backcountry. Other hand pumps like the Katadyn Hiker and Katadyn Hiker Pro offer better durability and easier maintenance, while the MSR Guardian Purifier is our favorite option for turbid water sources. If you're after a filter with enough capacity to supply clean water for a group, check out the Platypus GravityWorks, the LifeStraw Peak Gravity 3L, or the MSR AutoFlow XL. And if solo missions are your thing, check out the LifeStraw Peak Squeeze. That's our main squeeze when moving fight and light.
—Amber King
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