MSR Guardian Gravity Purifier 6012-587

MSR Guardian Gravity Purifier

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Show Description

A true game changer that makes almost any questionable water source safe to drink. The Guardian purifies and filters water, so you don't need to carry chemical water treatment or a UV purifier when you're in virus territory. The gravity system is a low-effort option that needs no pumping - simply fill and raise the reservoir and let gravity filter and purify your water while you set up camp, prep dinner, or just relax.

  • Durable film reservoir with 1000-denier fabric bottom for increased abrasion resistance.
  • Hollow fibre technology uses polymer fibres to create a high-surface-area filter that allows water to flow quickly through a 0.02 micron effective pore size.
  • Activated carbon reduces concentrations of some chemicals (including iodine and chlorine), odours and tastes.
  • Purge valve flushes system without the need to backflush.
  • Universal bottle attapter attaches to most water bottles.
  • Meets NSF protocol P248 military standards.

Tech specs

Show Tech specs
Weight 532g
Ideal for
  • Camping and hiking
  • Backpacking
  • Travel
Filter type

Water can be treated using various types of filters, chemicals or non-chemical purification methods, or a combination. Filters on their own will not remove viruses as they are too small.

Hollow fibre technology
Output 1L/min
Dimensions 21 x 12cm
Cartridge life

The life of the filter cartridge is based on the quantity of water you can treat before the cartridge is no longer effective. This does not apply to battery operated or chemical filter systems.

Filter size

A 0.5 micron or smaller filters protozoa and some large bacteria; 0.2 micron or smaller filters smaller bacteria such as campylobacter.

Effective against protozoa

Protozoa are larger than one micron and include cryptosporidium and giardia.

Effective against viruses

Most viruses are in the 0.1 micron size range, but they can be as small as 0.002 microns.

Effective against particulate

Particulate consists of very small bits and pieces such as dirt or bugs.

Effective against bacteria

Bacteria can cause illnesses such as diarrhea and dysentery and are about 1.0 micron in size, although some can be as small as 0.2 microns.

Made in USA