Platypus GravityWorks 4.0L Filter System


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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.


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 will 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
  • Silicone tubing

Tech specs

Ideal for
  • Camping and hiking
Hollow fibre technology
Dimensions4.5 x 14.7cm
Made inUSA

Reviews (204)

4.480392156862745 out of 5 stars with 204 reviews for Platypus GravityWorks 4.0L Filter System

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