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MSR Guardian Filter Cartidge Replacement


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For the exceptionally well hydrated.

The hollow fiber filter in the MSR Guardian Filter Cartridge Replacement is meant to filter over 10,000 liters, but if you somehow surpass that, pick up the Guardian Filter Cartridge Replacement and enjoy another 10,000 bottles full of clean, clear, and crisp H2O.

  • Hollow fiber filter
  • Compatible with the MSR Guardian filter
  • Item #CAS006E

Purifying Element
hollow fiber
protozoa, bacteria, viruses, sediment
Pore Size
0.02 micron
Cartridge Life
10,000+ L
2.5 L / min
Field Cleanable
Recommended Use
backpacking, camping
Manufacturer Warranty
limited 3 years

Tech Specs

California Proposition 65


This product can expose you to chemicals including Styrene, which is known to the State of California to cause cancer. For more information go to

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