Platypus Gravityworks 4L Filter System Reivew


Platypus GravityWorks 4.0L Filter System

Product Number: 5035-528
Made in USA

Weight: 326g

This pump-free system is gravity fed and offers a high-flow capacity. Fill the unfiltered water reservoir, raise, and hang it. You’ll have 4L of clean water in under 3 minutes.

The fibres in this filter are slightly more brittle than other types. Although the cartridge is encased in a protective rubber shell, and drop-tested to seven feet, consider carrying a spare cartridge on long trips – they are small, light, and relatively inexpensive.

  • Filters 4L of water in less than 3 minutes (depends on water quality).
  • Hollow fibre filter has a high surface-area that allows water to flow quickly through a 0.2 micron effective pore size.
  • Do not allow the cartridge to freeze after initial use.
  • Nominal 1500L filter life is for clear water, turbidity wiil reduce the useful life of any filter.
  • Maintain a high flow rate in the field by holding the clean water reservoir above the unfiltered reservoir. No disassembly required.
  • Unfiltered reservoir has a webbing handle for carrying and hanging. Quick-disconnect valve automatically cuts the flow of water when the hose is disconnected. Hose connection on the side won’t collect silt and debris.
  • Clean reservoir has a webbing loop and a simple hose connection, and no top zipper, so it won’t pop open while in use.
  • Reservoirs are made of silver ion-treated polyethylene film that doesn’t pick up tastes.
  • Clip-style shut-off valve on output hose between reservoirs.
  • Silicon tubing.


Weight 326g
Ideal for Camping and hiking
Filter type Hollow fibre technology
Cartridge life 1500L
Dimensions 4.5 x 14.7cm
Filter size 0.2microns
Output 1.75L/min
Effective against bacteria Yes
Effective against particulate Yes
Effective against protozoa Yes
Effective against viruses No



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