Platypus · PRODUCT RESEARCH
Platypus GravityWorks Water Filter System 4.0L
Group water batches where a suitable hanging point and treatment plan exist
As an Amazon Associate, we earn from qualifying purchases. How our links work.
Check the exact model, size and included accessories at the retailer. We do not sell or ship this product.
Where it makes sense
The four-liter GravityWorks suits a group that wants to filter a batch while doing other camp tasks. Separate dirty and clean reservoirs make the workflow visible, though careful handling is still needed to keep outlet parts away from untreated water. Platypus lists a complete system weight of 326 grams and a maximum flow figure that depends on conditions and maintenance. It explicitly lists no effectiveness against viruses or chemicals and toxins. A gravity filter therefore solves the effort of processing water, not every source-risk problem. Protect a used cartridge from freezing and use the manufacturer procedure for cleaning and storage.
The tradeoff
Not effective against viruses or chemicals/toxins; wet hollow fibers must not freeze
Documented specifications
| Reservoir size | 4.0 L |
| System weight | 11.5 oz / 326 g |
| Pore size | 0.2 micron |
| Listed flow | Up to 1.75 L/min |
| Manufacturer exclusions | Viruses; chemicals/toxins |
Sources & further reading
Manufacturer: Platypus GravityWorks Water Filter System 4.0L ↗Manufacturer specifications and guidance checked September 2026. Model generations and included accessories can change; confirm the exact version before ordering.
