HydraPak 42mm Filter Cap

Turn your HydraPak Seeker or Flux into a backcountry water filter in seconds.

The HydraPak 42mm Filter Cap threads directly onto compatible 42mm HydraPak bottles, flasks, and water storage bags, giving you a lightweight filtration system without carrying a separate pump or bulky filter.

Pair it with a Seeker water storage bag to collect water and squeeze-filter it into bottles at camp, or screw it onto a Flux, UltraFlask, or SkyFlask and drink freshly filtered water directly from the container.

The hollow-fiber filter provides a flow rate of more than 1 liter per minute and can treat approximately 1,500 liters of water with proper use and maintenance. A protective dust cover keeps the drinking nozzle cleaner between uses and can be opened and closed with one hand.

Why We Like It

This is a really slick setup when paired with a Seeker. Carry the Seeker rolled up in your pack, fill it when you reach water, screw on the filter, and you've got a lightweight squeeze-filtration system for camp.

It's also versatile enough to move between compatible HydraPak bottles and flasks, so one filter can cover everything from backpacking and camping to day hikes and trail runs.

Compatible With

• HydraPak Seeker water storage bags

• HydraPak Flux flexible bottles

• HydraPak UltraFlask soft flasks

• HydraPak SkyFlask handhelds

• Other compatible 42mm-thread bottles, flasks, and water storage containers

Filtration

The hollow-fiber membrane effectively removes common waterborne bacteria and parasitic cysts, including E. coli, Giardia, and Cryptosporidium.

• Filters approximately 1,500 liters

• Flow rate greater than 1 liter per minute

• Hollow-fiber filtration

• No batteries or chemicals required

Details

• 42mm threaded filter cap

• Use for drinking directly or squeeze-filtering into another container

• High-flow drinking nozzle

• Protective dust cover

• One-handed opening and closing

• Lightweight and compact

• Threads directly onto compatible HydraPak containers

• Great for backpacking, hiking, camping, and travel