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Platypus Gravity Works 6L filter cartridge
Platypus Gravity Works 6L bag valve detail
Platypus Gravity Works 6L components

Platypus Gravity Works 6L

No more pumping "time-outs" - this water filter lets you sit back and enjoy the day while it filters up to 1.75 litres per minute.  Great for groups, the bags can store and transport 12L of water.  It's easy to use - simply fill the "Dirty" bag with water and hang it in a tree, open the valve, and let gravity pull the water through the filter and into the "Clean" bag.  (Make sure you drink out of the right bag.)  Just before the dirty bag empties, backflush some clean water through the system by hanging the clean bag higher for a few seconds.  This keeps your filter clean, and it should last up to 1500 litres of water in its lifetime.

The 0.2 micron hollow fiber filter removes bacteria and protozoa including giarda, cryptosporidium, E. coli, salmonella and cholera.