Head-to-head · Best Backpacking Water Filters

Platypus GravityWorks 4L vs Sawyer Squeeze Water Filtration System

Which is the better buy? Side-by-side on rating, price, strengths, and watch-outs — with the published ratings we averaged to get there.

The short answer

Sawyer Squeeze Water Filtration System comes out ahead by a narrow margin (4.5 vs 4.7). The gap is mostly about Thru-hikers and backpackers who want one proven, near-permanent filter that is light, fast, and works in any configuration. — read the strengths below before deciding.

Ranked #4 in Best Backpacking Water Filters

Platypus GravityWorks 4L

4.5

$135as of May 25

The Platypus GravityWorks 4L is the group and base-camp filter. Both CleverHiker and OutdoorGearLab score it 75 and call hands-free gravity filtration tough to beat for pairs and groups: hang the dirty bag, walk away, and return to clean water. It filters large volumes quickly and has a longer filter life than the personal squeeze filters. It is heavy, bulky, and pricey, so it is the wrong tool solo, but unbeatable for filtering for several people.

Strengths

— Hands-free gravity filtration: hang the dirty bag and walk away while it fills the clean one
— Filters large volumes fast, ideal for groups, couples, and base camps
— Fast treatment time for a gravity system, scoring 9.0 in OutdoorGearLab's flow metric

Watch-outs

— Heaviest system here at 11.5 oz, overkill for solo ultralight trips
— Most expensive filter on this list
— Bulky 4-liter bags take up more pack space than a personal filter

$135 · Check Price on Amazon Full review →

Higher ratedRanked #1 in Best Backpacking Water Filters

Sawyer Squeeze Water Filtration System

4.7

$46as of May 25

The Sawyer Squeeze is the long-running default for backpackers, and the experts still rank it at or near the top. CleverHiker makes it their overall Editor's Pick, OutdoorGearLab scores it 78 of 100, and GearJunkie names it the best thru-hiking filter. Its standout trait is a 100,000-gallon lifespan, so one filter can outlast years of trips. The pouches are weak, but the filter itself is fast, light, and essentially permanent.

Strengths

— Effectively unlimited 378,541-liter (100,000-gallon) filter lifespan, the best long-term value here
— Fast flow rate, filtering a liter in roughly 40 seconds when clean
— 0.1-micron hollow-fiber membrane removes bacteria, protozoa, and sediment

Watch-outs

— Included pouches are flimsy and prone to splitting; many upgrade to CNOC bags
— Backflushing with the included syringe is needed to maintain flow
— Cannot be allowed to freeze, which ruptures the hollow fibers

$46 · Check Price on Amazon Full review →

How they stack up

Platypus GravityWorks 4L

The only hands-free group system here, filtering far more volume at once than the personal Sawyer Squeeze, Katadyn BeFree, or Platypus QuickDraw, but it is the heaviest and priciest; its 1,500-liter filter outlasts the BeFree and QuickDraw while falling short of the Sawyer.

Sawyer Squeeze Water Filtration System

Outlasts the 1,000-liter Katadyn BeFree and Platypus QuickDraw filters many times over, and is lighter and more versatile than the group-oriented Platypus GravityWorks 4L; faster and longer-lived than the MSR TrailShot but with weaker stock pouches.

Specs side-by-side

Spec	Platypus GravityWorks 4L	Sawyer Squeeze Water Filtration System
Type	Gravity hollow-fiber	Hollow-fiber squeeze
Filtration	0.2 micron	0.1 micron
Weight	11.5 oz	7.9 oz (kit)
Capacity	4 L reservoirs	—
Filter Lifespan	1,500 L / 396 gal	378,541 L / 100,000 gal
Removes	Bacteria, protozoa, sediment	Bacteria, protozoa, microplastics
Operation	Hands-free gravity feed	—
Freeze Safe	No	No
Flow Rate	—	~40 sec per liter
Configurations	—	Squeeze, gravity, inline, straw

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