HydraPak UltraFlask+ Filter Cap Water Filtration Accessory (42mm Thread)
HydraPak UltraFlask+ Filter Cap Water Filtration Accessory (42mm Thread)
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30-Day Hassle-Free Returns
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✔ Delivery time: 3–7 business days
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About This
- FAST & SAFE FILTRATION: The integrated filter removes Escherichia coli bacteria, Cryptosporidium parvum cysts, and Giardia Lamblia from approximately 1,500 liters of water at a rate of >1L per minute.*
- LIGHT AND COMPACT: Minimal design and lightweight materials make this filter the ideal choice for runners. It takes up no extra space when stored or threaded directly onto a flask.
- HIGH-FLOW: Easy to drink bite valve auto-seals after each sip, eliminating annoying drips.
- COMPATIBLE: Perfect for trail running or backcountry water filtration. Works with all 42mm opening HydraPak products including running flasks, Seekers and Flux bottles.
- INCLUDED BACKFLUSH ADAPTER: Plugs into filter valve and threads onto a HydraPak Stow or bottle of clean water for backflushing the filter to restore its flow rate.
Overview
- Brand : HydraPak
- Special Feature : Hollow Fiber Filtration
- Product Dimensions : 1.97"L x 1.97"W x 7.87"H
- Material : ABS, POM, Silicone, Hollow Fiber
- Capacity : 1500 liters
- Included Components : 42mm Hollow Fiber Water Filter Cap
- Package Information : Bottle
- Installation Type : Freestanding
- Purification Method : Hollow Fiber Membrane
- Power Source : Manual Operation

Experience the difference clean, softened water makes in your daily life — from healthier skin to better tasting drinking water.
👉 Softer skin and smoother hair with every shower.
👉 Prevent scale buildup and keep your appliances running efficiently.
👉 Softer, brighter clothes that last longer with every wash.
See the Difference in Your Water — Instantly
Hard water, chlorine, and hidden contaminants can affect your health, skin, and appliances.
Our advanced filtration system removes impurities and delivers clean, safe water throughout your entire home.
Feel the difference in every drop — from your kitchen to your shower.
FAQ
Water Filtration & Home Water Guide