Mountain Equipment Company

MSR Guardian Gravity Purifier


Colour: Grey

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Rocksolid guarantee

Shop with confidence. If it’s not working out, you can return it (consumables, electronics, undergarments and swimwear excluded).
Really. If it's not up to snuff after you use it (a couple times) you can still bring it back. It lasts longer than 30 days, but not forever. We'll be fair about it.


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

Weight532g (Grey)
Ideal for
  • Camping and hiking
  • Backpacking
  • Travel
Hollow fibre technology
Dimensions21 x 12cm
Made inUSA

Reviews (16)

3 out of 5 stars with 16 reviews for MSR Guardian Gravity Purifier

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