Editor's Choice

MSR Trail Base Water Filter Kit

When it comes to water filtration systems there are a myriad of different ways to get your water clean. By clean, I mean the actual filtering of dirt and debris as well as filtering water on a microbial level. I’m here to announce I have found the most effective gravity and portable trail water filter I have ever used.


A little of the technical stuff:

  • Filters 99.9999% Bacteria
  • Filters 99.9% Protozoa including Giardia and Cryptosporidia
  • Filters Particulate
  • Hollow fiber filter meets U.S. EPA drinking water standards* and NSF protocol P231 testing standard.
  • Not a Purifier – Doesn’t filter all viruses


Weight: 1lb

Filter: Hollow Fiber

Flow L/min: 1liter per min claimed

Flow Strokes per liter: 60 pumps

Field Maintainable: Yes

Field Cleanable: Yes

Cartridge Replacement Indicator: Yes

The portable Trail Filter shoots water about 8ft when new, it has serious water pressure!


Dirt & Sol Test Stats

  • Time – 00:02:46 – Filtered 2L of water using the gravity filter
  • Time – 00:01:13 – 50 pumps using the handheld pump filled a 32oz Nalgene bottle
  • Time – 00:00:37 – 27 pumps to fill 27oz cycling bottle

How -To

Gravity Mode:

  • Remove Male Disconnect from the Female Disconnect on the Dirty Water Reservoir
  • Place Dirty Water Reservoir in water source or fill reservoir with dirty water
  • Fold top of reservoir 4+ times once full
  • Hang reservoir high above the ground without putting tension on the hose
  • Close Shut Off Clamp on hose
  • Screw Trail Filter to long hose coming from Dirty Water Reservoir
  • Connect Trail Filter with male end into clean water reservoir with female end
  • Place Clean Water Reservoir flat on ground with Trail Filter on top
  • Open Shut Off Valve
  • Prime pump 5x to get water flowing
  • Enjoy!¬†

Trail Filter Mode:

  • Place red screw end of hose into water
  • Hold Trail Filter at 45 degrees
  • Squeeze the bulb
  • Let the bulb fill completely between each squeeze
  • Yea, it’s that easy

How Was it Tested?

  • Monarch Crest Trail – Mountain Biking
  • Buffalo Creek – Mountain Biking
  • Oregon Coast Vacation
  • Daily Camera Carry

I have used a myriad of different water filters from some the industries top companies. This system is by far the fastest gravity AND handheld system I have ever used. At one point during the testing process while mountain biking far in the backcountry, I could feel myself starting to bonk due to dehydration. I know my body well enough to know that I needed water in abundance and quickly! I pulled the bike over and found a stream, stuck the portable TrailShot end into the water and started to fill my bottles. In a matter minutes I had chugged 2 – 21oz bottles and refilled them again to keep on the bike for later.

When your body starts to bonk the use of a filtering system can seem a bit daunting, this system took out all the guesswork and just simply did its job. What more can you ask for?

We will be happy to hear your thoughts

Leave a reply