MSR HyperFlow Microfilter Water Filter - Black, 17.8x8.3cm

Really handy filter. You'll definitely need one of these when you're out in the hills. Many people think that you can get around spending the money by just taking a few bottles of water with you, but trust me this is not the case. Not only do you carry an additional kilo for each litre, but you will also run out of water fast. There's nothing worse than dehydrating in the middle of nowhere. I'd recommend to get a MSR water bag that is compatible with the filter as well. You can simply attach the lid to it that comes with the filter, so it'll lock and make it a lot easier to pump without losing a drop of water.

Can be tough on the hands and arms to pump but does a fantastic job.

Easy to use, small and stashes away great. Used it while camping and was very impressed.

Zunächst habe ich die Pumpe erst einmal in der heimischen Küchenspüle ausprobiert und bin von dem enormen Durchsatz fasziniert. Das Gerät fühlt sich wertig an, alle Schraubverbindungen sind sauber verarbeitet und das vergleichsweise geringe Gewicht ist auch nicht zu verachten. Natürlich kann ich erst nach diversen Tests in freier Wildbahn eine objektive Bewertung abgeben, ob und wie sich die Pumpe unter Extrembedingungen verhält und vor allem ob der Filter wirklich das hält, was er verspricht.

Worked great the first day out. By the second day, it was getting noticeably harder to pump. By the end of the third day of use, the filter required a tremendous amount of force to filter the water, and the pumping speed was about 5 minutes for a single litre (the quoted speed is 3 litres per minute). Followed all instructions for backflushing the filter during the trip, but that didn't help at all. Short of buying a new filter cartridge, this filter is now useless.

Génial, marche super bien, rapide et facile à utiliser en plus il s'adapte très bien avec l'adaptateur à la bouteille NALGENE 1litre

So far so good! The filter is very easy to operate and has an excellent flow rate that is nearly as fast as my Katadyn Vario. It is extremely light and takes up little space in my backpack. The included water-bottle lid (quick attach) doesnt fit my water bladders or the majority of my water bottles, but i was easily able to attach a tube to the filter outlet to fill my water storage devices. The backwashing procedure is very simple and overall is much less maintenance than the Katadyn Vario (which has way too many seals and is a constant battle to fight leaks and water bypassing the seals). The entire process of disassembling the pump (unscrew to parts, and reverse 2 check-valves) is simple and takes a few seconds. My only complaint is that the filter needs to be backwashed more often than i would like

I love this filter so much I bought 2, one for me and one for my son. I’ve filtered everything from clean mountain glacier water that probably didn’t need filtered to nasty stagnant swamp water. It is light and takes up very little room in a pack. Practice back flushing before you head out into the wilderness, it’s not hard but good to have tried it once before you use it for real. I’m on my 3rd year of light use, maybe 75 liters so far. With back flushing after every use and cleaning and drying after every trip it still has a good flow rate. Some important things to remember, this device does require some maintenance. It’s not hard or super time consuming to maintain but it does take more time than a drip filter or a steri pen. Also, this filter will not remove taste from water. If it is nasty stagnant water before being filtered it is still going to taste like nasty stagnant water after being filtered, just without bacteria that could make you sick. Overall I think this is a great filter that should last a long time.