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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 hydration 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.
- Gravity filter for easy cleaning of drinking water in nature
- Filters out bacteria, protozoa, and sediment
- Quick filtration gets you 1.75-liters per minute
- Tool-less cleaning makes it easy to clean in the field
- Filter directly into most any bottle
- Item #CAS009L
- Q & A
- Familiarity: I've put it through the wringer
I bought this filter to be used while working for the Forest Service In Idaho. I ended up choosing this filter primarily because I was looking for an alternative to pumping water. I mean does it get any easier than using gravity to filter water? Sign me up.
I really like the ease of filtering. All you have to do is fill the bag roll the top and hang the bag up in the tree and you are good to go. This bag is definitely really convenient but does have a few downsides.
To start off it is heavier than other non pump options. The other downside is having a place to hang it up which can be tricky in some environments.
Overall this is great filter for the right environment.
- Familiarity: I've used it several times
I've used pump filters and steripens and then this gravity filter. Life changing. Steripen works about 50% of the time, not worth it. Pump filters are great if you want an arm workout after a hike or are melting snow.
If you want to filter water for a group of 4 while backpacking, get this. Easy to set up, use, filter, clean. Took a couple tries to get right, and occasionally my dofus friends would get air bubbles in it which slows things down but if you follow the directions, you'll be filtering water with ease in no time.
Took this on a 3 day backpacking trip through the Enchantments in WA, group of 8 and this was all we used. No one got the runs.