Mountain Safety Research

Mountain Safety Research AutoFlow Gravity Filter


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Mountain Safety Research AutoFlow Gravity Filter

Gravity is goodthe MSR AutoFlow Gravity Filter uses the Earth's sucking power to filter one liter of water in just one minute. Keeps your posse hydrated with clear liquids by removing 99% of bacteria, protozoa, and particulates.

  • Flow rate: 1 liter in 1 minute produces clean water nearly on demand
  • Filters out 99.9999% of bacteria, protozoa, and particulates for pure water confidence
  • Disassembles and flushes without a single tool for easy maintenance and flow rate recovery
  • Package includes taste-free water bag, all hoses, fittings, and filters
  • Filter element: hollow core
  • Element pore size: 2 micron
  • Output rate: 1 liter / 1 minute
  • Dimensions: 4 x 6 inches
  • Weight: 10.5 ounces (empty)

Purchase the Mountain Safety Research AutoFlow Gravity Filter from All order totals over $45 qualify for free ground shipping.

5 Star Rating


5 Stars ScooterSal - March 9 2011

A backpacking lifesaver
Buying this filter was one of the best things we did. MSR has another model as well which is slightly smaller and lighter, but where the water needs to be manually pumped. We debated between the two and finally settled on this. The filter is fantastic. It's very easy to assemble, folds up into quite a small package that can be squeezed easily into a corner or the backpack. When we pass by a water body, all we do is fill the bag and hang it up on a tree as hte water filters through. Effortless, and a great opportunity to just have a break for a few minutes while the water filters and refills! The bag has 4L, which is plenty. The water flows fast, and takes about a minute per litre. This filter has totally transformed our backpacking experience by taking away the worry about water. It's an essential.

5 Stars ajjubes - February 15 2011

love it
it's so easy to use, and doesn't take too long to filter enough water to last the day. great for long trips. packs up super small and is very durable too!

5 Stars Shopper - January 11 2010

Sweet device, sweet deal, sweet water!
High quality materials and build as expected from MSR. Works great! Sooo easy to use: fill, hang, drink and be merry. Filters fast so you can fill everyone's bottles and bladders quick. Haul 4 liters back to camp, hang on a tree and it's like having your own spring. Could easily see this thing handling large group hikes etc.

5 Stars Shopper - May 23 2009

Multi-Tasking Camsite
Used on float trip in Alaska. Started water as soon as we decided on campsite. Had water when we were ready never had to wait(after: wood, tent, rafts, gear, game taken care of). While we never had to wait - not for those who need immediate access to water. Overall should be in every kit bag because it works while you are busy with other chores.

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