How It Works
Ready for the unexpected. Pure Flow Water Filter adapts easily to any situation.
Drink directly from a stream, connect it to your water bottle, or use it with the gravity bag. The high-performance filtration core works instantly using only natural pressure. No batteries. No pumping. No waiting.
Drink directly through the filter or squeeze the bag to push water through it.
Hollow-fiber membranes with 0.01-micron pores block bacteria and pathogens.
Harmful particles are trapped on the fiber surface and never reach your mouth.
Filtered water flows straight from the mouthpiece: clean, safe, and ready to drink.
A complete filtration system that fits in your backpack
What Pure Flow Water Filter Filters
THE MOST COMMON THREATS...
Pathogenic and Fecal Bacteria
All are larger than the membrane’s 0.01-micron pore size.
- E. coli
- Salmonella
- Shigella
- Campylobacter
- Vibrio cholerae (cholera)
- Fecal coliforms
Why it matters: They are responsible for most severe cases of waterborne illness worldwide.
Protozoa and Parasites
They are blocked due to their size and cellular structure.
- Giardia lamblia
- Cryptosporidium parvum
- Entamoeba histolytica
- Cysts and oocysts
Why it matters: These organisms can cause persistent gastrointestinal illness and dangerous dehydration.
Microplastics
Found in lakes, rivers, streams, and tap water.
- Particles and fibers
- Fragments and microbeads
- Polymers > 0.01 microns
Why it matters: Microplastics have been found in more than 80% of the natural water sources tested.
Organic Matter
It is trapped on the outer surface of the fiber membrane.
- Algae and biofilm
- Plant debris
- Decaying leaves
Why it matters: The buildup of organic matter affects both the taste and safety of water.
Inorganic Sediments
They are mechanically filtered before the water reaches the membrane.
- Sand and silt
- Clay particles
- Rust particles
Why it matters: They are found in virtually any untreated natural water source.
Turbidity and Visible Contaminants
Reduces turbidity and improves water clarity.
Why it matters: Clearer water does not necessarily mean it is safe to drink.
Biological Hazards (> 0.01 microns)
Traps a wide range of biological contaminants, including worm eggs, larvae, nematodes, and clusters of bacteria.
Why it matters: Water from untreated natural sources often contains biological hazards invisible to the naked eye.
Pure Flow Water Filter Straw
Pure Flow Water Filter Straw
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