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Pre-filter mesh
Stops larger debris before it reaches the membrane.
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DualFlow Outdoor Water Filter
Regular price
Sale price
$48.90
Regular price
$54.90
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Specifications
Specifications
- Net Weight: 64 g / 2.3 oz
- Flow Rate: Up to 2 L/min
- Filtration Accuracy: 0.1 Micron
- Bacteria Removal Rate: 99.9999%
- Bottle Compatibility: 28 mm and 42 mm Threaded Bottles and Water Pouches
- Filtration Method: Gravity-Fed or Squeeze Filtration
- Backwashing: Built-In 28 mm Backwash Interface
- Recommended Backwashing Frequency: After Every 5 L of Use
- Filter Housing Material: Antibacterial ABS
Feature
Feature
Three-Stage Filtration System
- Pre-Filter Mesh
Removes sand, sediment, algae and other large particles. - 0.1-Micron PES Hollow-Fiber Membrane
Physically blocks bacteria, parasites and other microorganisms larger than the membrane pores. - Silver-Loaded Microporous Activated Carbon
Reduces unpleasant odors and tastes while helping inhibit bacterial growth inside the filter.
Additional Features
- Dual 28 mm and 42 mm Bottle Compatibility
- Compatible with Standard 28 mm Plastic Bottles
- Built-In Backwashing without an Additional Adapter
- High-Frequency Welded Construction for Improved Leak Resistance
- Every Unit Undergoes Air-Particle Integrity Testing
- Bacteria Removal Performance Tested by SGS
Couldn't load pickup availability
99.9999%
Total coliform removal in SGS laboratory testing
64 g
Filter weight
Up to 2 L/min
Maximum flow rate
28 + 42 mm
Dual-thread compatibility
Carry less water
Refill from the trail with fewer compromises.
DualFlow combines two thread sizes with squeeze and gravity filtration, so one compact filter can move between the bottles and bladders already in your kit.
One filter, more trail setups
Change the container, not your whole hydration system.
Connect directly to compatible narrow-mouth bottles or pair it with a hydration bladder for hands-free gravity filtration.
28 mm
Standard bottles Compatible with many narrow-mouth trail bottles and soft flasks.
42 mm
Hydration bladders Designed to connect with compatible wide-mouth water storage.
2 modes
Squeeze or gravity Drink on demand or let the filter work while you set up camp.
From source to bottle
A simple routine when water is waiting.
Collect the clearest flowing freshwater available, connect the container that fits your trip, then choose squeeze or gravity filtration.
- 1CollectChoose the clearest flowing freshwater source available.
- 2ConnectAttach a compatible 28 mm bottle or 42 mm hydration bladder.
- 3FilterSqueeze for water on demand or hang the setup for gravity filtration.
Three-stage filtration
Three stages working in one compact path.
DualFlow combines a pre-filter mesh, a 0.1 μm PES hollow-fiber membrane and silver-loaded activated carbon to address sediment, bacteria, odor and off-tastes.
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0.1 μm PES membrane
Provides the primary physical barrier for bacteria and fine particles.
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Activated carbon
Helps reduce unwanted odor and taste for more enjoyable trail water.
Faster refills
Up to 2 L/min flow rate.
Spend less time waiting at the water source and more time moving.
Trail maintenance
Backflush without an extra adapter.
The built-in 28 mm backwash interface helps restore flow without adding another small part to your repair kit.
Why it’s trustworthy
Lab-tested performance. Every membrane integrity-checked.
SGS testing measures filtration performance under stated laboratory conditions, while a 100% air-integrity inspection checks every hollow-fiber membrane before assembly.
99.9999%
SGS-tested total coliform removal at start-up
100%
Hollow-fiber membranes air-integrity inspected
Performance measured. Integrity checked.
A challenged influent of 3.0 × 10⁶ CFU/100 mL was reduced to 1 CFU/100 mL in the SGS-tested sample. Before assembly, every hollow-fiber membrane is also air-tested to screen for leaks and verify filter integrity.
View SGS test reportAntibacterial ABS activity
Measured against E. coli in a separate 24-hour laboratory test.
View material testMeasured silver increase
The tested activated-carbon samples met the referenced ≤0.005 mg/L requirement.
View silver-release testFilter first, then disinfect when risk is uncertain.
CDC identifies boiling as the best option. When boiling is not practical, filtering followed by an appropriate disinfectant is the next best choice. DualFlow provides the filtration step.
View CDC water-treatment guidanceWater source guidance
Choose the clearest source available.
Designed for
- Clear, flowing freshwater in the backcountry
- Squeeze filtration from compatible bottles
- Gravity filtration from a compatible hydration bladder
Not designed for
- Seawater or other saltwater
- Viruses or all chemical contaminants
- Industrial runoff, wastewater or stagnant water
- When safety is uncertain, boil or treat the water using an appropriate method
Questions, answered
Before you head out.
Which containers fit DualFlow?
DualFlow supports compatible 28 mm narrow-mouth bottles and 42 mm hydration bladders. Thread tolerances can vary, so test the seal before relying on a new container in the field.
How do I restore the flow rate?
Backflush the filter with clean water through the built-in 28 mm backwash interface. Regular maintenance is especially helpful after filtering silty water.
Does it remove viruses or salt?
No. DualFlow is not a desalinator and is not designed to remove viruses or every dissolved chemical contaminant.
Can I filter any stream water?
Always choose the clearest flowing freshwater available and avoid water affected by industry, wastewater, heavy algae or obvious chemical contamination.