Hydrapak 42mm Filter Cap - Bite Valve

Run fast and filter faster with the UltraFlask™ Filter Cap, designed to seamlessly thread onto HydraPak’s 42 mm running flasks and handhelds. Offering a lightweight and easy filtration solution, it features a traditional bite valve and cap design, allowing runners to drink freshly filtered water directly through the high-flow Blaster valve.

Perfect for trail runners and endurance athletes, the UltraFlask™ Filter Cap combines lightweight convenience with effective water filtration, so you can stay hydrated without slowing down.
Effectively removes common waterborne bacteria, such as E.coli (99.999%) and parasitic cysts (99.9999%) per HSF 42. Features

- Fast and Safe Filtration
Removes Escherichia coli bacteria, Cryptosporidium parvum cysts, and Giardia Lamblia from up to 1,500 litres of water at a rate of >1 L per minute.
- Light & Compact
Minimalist design and lightweight materials make it an ideal filtration choice for runners, adding no extra bulk whether stored or threaded directly onto a flask.
- High Flow Design
The Blaster bite valve auto-seals after every sip, ensuring a smooth drinking experience without leaks or drips.
- 42 mm Thread Compatibility
Fits easily onto HydraPak’s running soft flasks, flexible bottles, and other water storage containers with a 42 mm thread.
- Included Backflush Adaptor
Restore flow rate by backflushing the filter using a HydraPak Stow or a clean water bottle, ensuring long-lasting performance.

Effectively removes common waterborne bacteria, such as E.coli (99.999%) and parasitic cysts (99.9999%) per HSF 42. Specs

- Diameter: 42 mm
- Weight: 36 g
- Length: 115 mm
- Materials: ABS, POM, Silicone, Hollow Fibre Compatibility

Compatible with the following Hydrapak products:

- Seeker
- Flux
- UltraFlask™
- SkyFlask ™