The MSR Sweetwater Purifier system combines the proven filtration of the SweetWater® microfilter with the chlorine-based SweetWater Purifier Solution for safe, clean water worldwide.

• Very easy to use
• Fast double action flow rate
• Complete purification system inc. viruses
• Long life filter cartridge
• lightweight

Get the added viral protection that’s critical in popular wilderness areas and developing countries with this comprehensive purifier/microfilter system. The SweetWater Microfilter removes waterborne bacteria and protozoa, particulate, taste and odors, while the chlorine-based SweetWater Purifier Solution effectively inactivates viruses. Together they provide the most reliable water possible. It pumps easily with a 4:1 mechanical advantage, producing 1.25L per minute and can easily be cleaned in the field without tools to restore flow rates.

This system meets U.S. EPA requirements for microbiological water purifiers.

* Comprehensive Protection: Inactivates 99.99% of waterborne viruses, eliminates over 99.9999% of all waterborne bacteria and 99.9% of common protozoan parasites, such as giardia and cryptosporidia, as well as particulates.
* Fresh Tasting Water: Activated carbon core helps eliminate taste and odors.
* Iodine-free: Inactivates viruses without bad-tasting iodine.
* Easy to Use: Lever-action pump handle has a 4-to-1 mechanical advantage and dual pump action, so you don't have to work as hard.
* Lightweight: Entire system weighs just 14 ounces.
* Compact: Handle folds flat when not in use for easy packing and storage.

Effective against protozoa Yes
Effective against bacteria Yes
Effective against viruses Yes
Effective against particulate Yes
Effective against chemicals/toxins Yes
Weight 14 oz / 397 g
Width 2 in / 5 cm
Length 7.5 in / 19 cm
Filter media Silica Depth Plus Sodium Hypochlorite
Filter pore size 0.2 microns
Flow (L/min) 1 liters per min
Flow (strokes per liter) 75
Cartridge life 750 liters
Field cleanable Yes
Field maintainable No
Country of Origin Made in Seattle, USA
Mechanical advantage Yes
Water Bottle Adapter Yes
Cartridge replacement indicator Yes


Winner of a "best of the best" 2009 Editors' Choice Award from Women's Adventure Magazine for ease-of-use and offering "extra protection and peace of mind."