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Let gravity do the work.

Collect, filter, and store your water in the backcountry with the quick and convenient MSR Autoflow Gravity Filter. This field-cleanable filter lets gravity do the work and cleans nearly two liters of water per minute. The four-liter reservoir holds enough wet stuff for your whole group, and the adapter end piece fits onto most standard water bottles and reservoirs. It's field cleanable, too, so you can remove all the bacteria, protozoa, and sediment that's been filtered out and have a filter that's good as new in minutes.

  • Hollow fiber filter
  • 4L reservoir
  • Universal bottle adapter
  • Field cleanable
  • Gravity powered

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MSR AutoFlow Gravity Filter

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Here's what others have to say...

4 5

Great but not Perfect

A vast improvement over pumping. So nice to focus on other tasks while you filter an enormous amount of water. Filter rates of 1 L a minute though are highly optimistic. The biggest issue seem to be air bubbles which get lodged in the filter medium. These can be removed by backflushing after you filtered a half liter of water or so but still the filter rate was never close to what was claimed. Maybe in a crystal clear Alpine stream but I was working with murky desert water.

The dirty water bag seems bomber compared to the competition and dromedary bags are still the best. Filter seems a bit fragile but is easily replaced.