HydraPak 42mm Filter Cap

8 items left

Experience clean and filtered water wherever you go with the latest 42MM Filter Cap. This innovative cap conveniently screws onto HydraPak's 42MM threaded Seeker water storage bags and Flux flexible bottles, transforming them into reliable filtration systems. The outcome is a portable and lightweight filtration kit that can be used to filter potable water and store it in other containers or to drink directly from the Seeker or Flux, providing a quick and effortless water treatment solution on your outdoor adventures.

The 42MM Filter Cap is an ideal addition to your camping and hiking gear, providing a practical solution for filtering water while on the go. Its seamless thread design ensures compatibility with all sizes of HydraPak’s 42MM threaded Seeker water storage bags and Flux flexible bottles, making it incredibly versatile and easy to use.

Whether you need to replenish your water supply or want to quench your thirst, the 42MM Filter Cap makes it effortless to filter water anytime and anywhere. With its efficient filtration system, you can rest assured that your water is free from impurities and harmful particles.

In conclusion, the 42MM Filter Cap is an essential piece of equipment for outdoor enthusiasts who prioritize safety and convenience. It is an investment worth making, as it guarantees that you always have access to clean and filtered water on your adventures.


    At only 57 grams, this filter is one of the lightest filter options available. Its small size takes up no extra space when stored or threaded directly onto a Seeker or Flux.


    Keeps dust off your drink nozzle. Quickly opens and closes the drink nozzle with one hand without any direct contact with dirty hands.


    Easily thread the filter onto some of the most popular backpacking water storage bags and flexible bottles including the HydraPak Seeker 2L, 3L, 4L, and 6L and 1L and the Flux 750ML, 1L, and 1.5L


    Removes 99.99% of E Coli & Parasitic cysts. Filters approximately 1,500 liters of fresh water at a rate of >1 L per minute.

  • SAFE

    Filter removes Escherichia coli bacteria, Cryptosporidium parvum cysts, and Giardia Lamblia (99.9%) from approximately 1,500 liters of water.


    100% BPA and PVC Free


      • DIAMETER 42 mm

      • WEIGHT 57 G / 2.0 oz

      • MATERIALS PP/POM, EPDM, Silicone, Hollow Fiber

      Customer Reviews

      Be the first to write a review