Platypus GravityWorks 4.0L.
4-liter gravity filter system that processes water hands-free while you set up camp. The group-trip standard for filtering large volumes without effort.
The Verdict.
Gavler Meta-Score
“The group-trip workhorse. 4 liters of hands-free filtration with a clean-water reservoir that doubles as a camp dispenser. Heavier than squeeze filters but eliminates the filtering bottleneck for groups of 3-6.”
The Gavler Verdict
Precision Engineering
4-Liter Capacity
Largest gravity filter system — filters enough water for a group of 4 in one fill.
Dual-Reservoir System
Clean-water reservoir with shut-off valve doubles as a camp water dispenser.
1.75 L/min Gravity Flow
Hands-free filtration at camp — hang and walk away.
Technical Specifications
The Scoreboard
Best large-volume gravity filter for groups. Deducted for weight and lack of virus removal.
Cast Your Vote
Do you think Platypus GravityWorks 4.0L deserves the #6 spot in Best Water Filters & Purifiers?
Best Price Availability.
Prices checked April 2026
Global Critique
“The gravity filter that started the category — still the best for large groups.”
“The dual-reservoir system with the camp dispenser is a genuine quality-of-life improvement.”
“Best hands-free water filtration for groups who want to filter and forget.”
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