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Platypus GravityWorks 4L Water Filter System
8.6/10 Great
Platypus GravityWorks 4L gravity filter review. Hands-free operation, 1.75 L/min flow, 8L total storage. Real-world testing for group camping and basecamp use.
$120
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Last updated: 2026-04-08
Score Breakdown
Portability 7.5/10
Value 8.5/10
Features 9.0/10
Build Quality 8.5/10
Pros & Cons
What We Like
- Hands-free gravity operation — hang it and walk away
- 4L dirty + 4L clean bags provide 8L total water storage for groups
- 1.75 L/min flow rate is excellent for a gravity system
- Backflushable to restore flow rate in the field
- Ideal for basecamp or group camping where volume matters
Watch Out For
- 1,500-liter filter life is shorter than Sawyer filters
- 11.7 oz total system weight is heavier than squeeze filters
- Requires a tree or elevated anchor point to hang dirty bag
- Does not remove viruses — not a purifier
- Reservoir bags can develop leaks at seams with heavy use
Full Specifications
| Filter Type | hollow fiber membrane gravity |
| Weight Oz | 11.7 |
| Capacity Liters | 4 |
| Total Storage Liters | 8 |
| Flow Rate | 1.75 L/min |
| Filter Life Gallons | 396 |
| Filter Life Liters | 1500 |
| Pore Size | 0.2 micron |
| Contaminants Removed | bacteria, protozoa, microplastics |
| Requires Power | false |
| Virus Removal | false |
| Bpa Free | true |
| Backflush Capable | true |
| Serves People | 1-6 |
| Includes Bags | true |
| Dirty Bag Liters | 4 |
| Clean Bag Liters | 4 |
| Operating Temp | above freezing |
Best For
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