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MSRTrail Base Gravity Filter System

MSRTrail Base Gravity Filter System

$139.95 - $149.95

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3.5 out of 5 stars
2 Reviews

Multi-sport water purification.

MSR's Trail Base Gravity Filter System doubles between long-haul backpacking trips and fast-and-light trail runs when frequent water sources don't require you to carry a whole lot of water. When you're backpacking, set the reservoirs up as a gravity-fed purification system by placing the full dirty water reservoir above the clean water reservoir and letting the hollow fiber filter and gravity do the rest. When you just need a quick 20 ounces to get you through your hike or trail run, simply place the hose in a water source and pump the filter into your water bottle to quickly filter out bacteria, protozoa, and particulates.


  • Versatile water filtration system for hiking or backpacking
  • Can be utilized as a pump-action filter or gravity-fed system
  • Includes hollow core water filter that is field maintainable
  • Eliminates protozoa, bacteria, and particulate matter
  • Made in the USA of US and imported materials
  • Item #CAS00CJ

Tech Specs

bacteria (99.9999%), protozoa (99.9%), and particulate
hollow fiber
Pore Size
Cartridge Life
1,500 liters
gravity, pump
2 liter, 4 liter
1 liter per minute
Field Cleanable
clean and dirty reservoir, 3-in-1 cap, filter, tubes
[2L] 6.5 x 15 x 3in, [4L] 8.5 x 15 x 2.5in
Claimed Weight
[2L] 1lb, [4L] 1lb 2oz
Manufacturer Warranty
limited 3 years
backpacking, hiking

Overall Rating

3.5 based on 2 ratings

Review Summary

5 Stars - 0 reviews
4 Stars - 1 reviews
3 Stars - 1 reviews
2 Stars - 0 reviews
1 Stars - 0 reviews

Fits Small

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