Versa Flow with 3L Reservoir

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The Versa Flow was designed to be as versatile as you. Add a 3L Top Fill Reservoir and it becomes the ultimate hydration tool that easily adapts to your lifestyle. Combining the Versa Flow as an inline filter allows you to use it with your hydration pack or used as a gravity system.

The Versa Flow water filter is one of the lightest and most convenient personal water filters on the market. Weighing in at only 2 ounces you don’t have to worry about adding extra weight to your pack or try to find a dedicated spot for it. It will fit virtually anywhere. This water filter is perfect for backpacking, hiking, camping, travel, and emergency preparedness.

The 3L Top Fill Reservoir is one of the most convenient reservoirs anywhere. Most hydration reservoirs are designed with a circular screw off cap that makes them hard to clean and nearly impossible to fill to capacity. Our Top Fill reservoir, on the other hand, opens easily by rotating the two red tabs on the top and separating the sides. It is like big a zip lock bag on steroids. This design means you can easily fill and clean your reservoir any time. We also put extra thought into the design of our bite valve, which rotates to seal off your liquids from dripping when you are not using it.

Although it is lightweight, the Versa Flow is heavy in features. Every filter is built to exacting standards and exceeds EPA standards for filtration. The Versa Flow has many tiny tubes called hollow fiber. Hollow fiber works through size exclusion. Meaning the hollow fiber tubes have thousands of tiny holes (0.1 microns) that block 99.9999% of harmful bacteria, Giardia, E. coli, protozoan cysts, Cryptosporidium and more. All of these organisms are too large to fit through the 0.1 micron holes. Some manufacturers filter the water through the core of the hollow fiber tubes, but this restricts water flow because only so much water can fit through the core opening. We filter water through the outside of the tubes by bending the hollow fiber. This dramatically increases the surface area and flow rate of the filter while protecting the filter integrity itself. If the core of the tubes become clogged from sediment on the competitor's filter you can no use the filter. The Versa Flow allows you to be able to backflush the filter, clearing out all of the particulates and increasing the lifespan of the filter. If you consistently backflush the filter you can use it almost indefinitely. This means no additional filters, cartridges, pumps, iodine drops, or batteries to ever buy again.

The Versa Flow water filter does not remove chemicals or viruses from water. Generally, viruses are not found in North America or in municipal water supplies around the world. Lightweight and low cost, the Versa Flow should be in everyone's backpack, survival gear or travel bag.


  • The Versa Flow removes 99.999% of all bacteria, such as E.coli, salmonella, and cholera. It also removes 99.999% of all protozoan cysts, including giardia, cryptosporidium and other protozoa.
  • Hollow fiber membrane
  • Flow rate of 1 gallon in 5 minutes
  • Attaches to standard plastic bottle with internal 28 mm threading, can be used inline on hydration packs, gravity or bucket system, or used as a straw to drink directly from your water source
  • Metallocene PE high strength and test free film (BPA, Latex & PVC free)
  • Tough construction for maximum abrasion resistance
  • Easy-to-use top fill clip for easy filling, draining, or cleaning
  • Bite valve retainer
  • Patented articulated "Bite Me" valve with twist on/off
  • Anti-microbial bladder interior and drink tube to prevent bacteria and mold


  • Filter Material: Hollow Fiber
  • Removes: Bacteria, Protozoan cysts, Giardia, Cryptosporidium, E. Coli, Salmonella and more
  • Filter Life: up to 100,000 gallons
  • Total capacity: 3.0 Liters
  • Weight (empty): 5.6 oz.
  • Measurements (empty): 13" L x 8" W


  • 1 – Versa Flow Filter
  • 1 - 3L Top Fill Hydration Reservoir

4 Reviews Hide Reviews Show Reviews

  • 5

    Posted by Sara R on May 16th 2018

    I used this product on my recent camping trip to the desert. I filled up the reservoir with water from a source not known to be potable and used the gravity method to get clean water into our hydroflasks. We cooked and made coffee with the water! When we went out for a day hike we just threw the reservoir into our pack and had plenty of clean water. When my husband goes gold panning, I throw the versa flow in his pack for emergencies. It’s nice that this package allows multiple different methods of filtering since our family is always doing different activities outside.

  • 5
    Great product

    Posted by oscar_92ff on Apr 24th 2018

    It is a great filter, the water flow is pretty good and quality of materials are great, very easy to clean, super lightweight. The 3l water bag is good too, great materials and easy to wash but a little hard to clip in some backpacks, the hole for clip mount is so narrow (even for 3mm+ paracord), and the hose could be a little more flexible but it is fine, about the nozzle... Well it gets dirty very fast (dust, fluff and more) could be great include a cap for keep it clean. Out of that it is a great water bladder.

  • 4
    Good Deal

    Posted by grrlzone on Mar 2nd 2018

    Very good water filtration system for ultralight backpacking and mountaineering. HydroBlu is comparable to Sawyer mini but this set up has the advantage of including a 3L reservoir/bladder that opens at the top and can be used to drink from directly (like a CamelBak, tubing and bite valve included) or used as a gravity feed. 3L Bladder is made from flexible, siliconized material which is bigger (3L) and appears to be much more flexible and durable than the standard Sawyer Mini bladders (that are small and some hikers complain that they delaminate quickly and are cheaply made.) In the case of the Sawyer, some hikers end up replacing the the bags that come standard with the Mini or Squeeze with larger Sawyer, Evernew or Platypus bags-- at extra cost. Time will tell if the VersaBlu reservoir will last, but it "feels" more like a "Camelbak" than a Dollar Store collapsible water bottle. Another advantage of the HydroBlu is that it is a top loading reservoir bag, so you can use a pre-filter (like a bandana or get fancy and use aquarium filter floss) inside the bag itself, to mechanically screen particulates out of the filter and extend filter life. The HydroBlu "in" connector has a dual connection: nozzle or thread. Like the Sawyer, the "in" thread matches perfectly on the hiker standard Smartwater bottle, so you can put "dirty water" in your bottle but suck out "clean" water through the "out" nozzle. This particular kit includes a bucket adapter with additional (grey) tubing, which is super handy if you plan to make additional mods (tornado, carbon filter, etc-- search youtube for mods). Possible improvements: There are very vague instructions so it wasn't clear where to locate the filter between the reservoir and the bite valve (user preference). Also, the "out" nozzle is a hair bigger than the nozzle on the Sawyer so it doesn't fit perfectly onto a Smartwater squirt adapter (nipple?) for backflushing. No backflushing equipment is included (like the Sawyer plunger). Easy fixes for all of these and not a deal breaker for me (I never use the Sawyer plunger!) Conclusion: the cost of this kit is about what the Sawyer squeeze costs but HydroBlu (which is the size of a Sawyer mini) comes with extra features (reservoir, bite valve, bucket adapter) that take the guess work out of modding. Looks to be a good product at a great price.

  • 5
    No more pumps, Wahoo!

    Posted by Emily West on Nov 4th 2017

    A filter that doesn't require a pump, Wahoo! All my life i've been used to the pump style water filter, they take ages to filter water and can require multiple rest breaks depending on how much clean water you need. Using the Versa Flow 3L I can filter twice as much water in half the time I could with my old pump. I'm so happy with this product!