MSR AutoFlow XL Gravity Water Filter

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The high-volume MSR AutoFlow XL Gravity Filter 10 L provides fast, no-pump water filtration for basecamps and extended stays in the backcountry, with fewer trips to haul water back to camp.

MSR says

Fast, high-volume water filtration for groups and basecamps.

This extra-large AutoFlow gravity filter system delivers 10 liters of clean water fast—all while you set up camp, prep dinner or relax. And its big capacity means fewer trips to the river to haul the water you need. Similar in packable size to the 4L version, the AutoFlow XL system’s durable flat base doubles the water volume for only 340 g (12 oz) of total weight. Ultralight and supremely packable, it offers the luxury of pump-free group filtration for basecamps, scout troops, horsepackers and other backcountry groups. And just one 10-liter fill of the reservoir can supply 1-2 people with a whole day’s worth of clean water.

Our Verdict

Gravity fed water filtration systems are quite new – the MSR Autoflow Gravity Microfilter is very light indeed – so its ideal for camp use. On the downside filters can get clogged – and this one will be no different – if you expect to take water from sources without sediment then this would be a good choice to filter out the nasties. Heavily contaminated water will clog it quickly though and it would only work excruciatingly slowly!

A 10 Litre bag on this model is very large and therefore suits a basecamp set-up or group use.

– Reviewed by Ultralight Outdoor Gear

Features

• Effective Against: Bacteria (99.9999%), protozoa (99.9%) and particulate. Hollow fiber filter meets EPA standards and & NSF Protocol P231 for removal of bacteria and protozoa.*
• Fast: Uses gravity to filter 1.75 liters per minute, letting you multi-task at camp.
• Versatile: Separate hang strap and bag clip allow for easy hanging for maximum convenience.
• Rugged: Durable 3-dimmensional film reservoir with RF-welded seams and a 1000-denier flat base that resists wear-and-tear.
• Field-Maintainable: Sediment trap in bottom of bag; filter is easily cleaned on the fly, no tools required.

Specifications

• Weight: 350g (excludes storage bag)
• Capacity: 10 Liters
• Dimensions: 30.5 x 12.7cm
• Filter Matrix: Hollow Fiber
• Filter Pore Size: 0.2 Micron
• Flow (liters per minute): 1.75 Liters per minute
• Flow (strokes per liter): Not applicable
• Cartridge Life: 1500 Liters