MSR USMC IWPS + MSR Thru-Link Filter Pair
Turn any hydration reservoir into a two-stage filtration system
Drop this inline pair into your hydration line and any reservoir becomes a field water filter. The USMC In-Line Personal Water System (IWPS) and MSR Thru-Link work together to deliver two stages of filtration—hollow-fiber to remove pathogens and particulate, plus activated carbon to cut chemicals, toxins, and bad taste. Trusted by the U.S. military for more than a decade, it's a proven addition to any water plan.
Two stages
- Hollow-fiber membrane: Physically removes bacteria, protozoa, and microplastics down to the micron level.
- Activated carbon: Reduces chemicals, toxins, and off-tastes for cleaner, better-tasting water.
Together they give you filtration that a single-stage straw or squeeze filter can't match—inline, hands-free, and drink-on-demand.
Includes male and female QD connectors (color may vary).
Performance:
- Bacteria: 99.99% removal
- Protozoa: 99.99% removal
- Microplastics: 99.99% removal
- Chemicals / toxins: reduced by the activated carbon stage
- Meets and exceeds NSF Protocol P231 for removal of bacteria and protozoa
- Backflushable to restore flow and extend filter life
- Flow rate: 1.5 L/min
- Filter dimensions: 7.5 in. x 1.6 in. OD · Weight: 2.5 oz
Important: pair with chemical treatment for viruses
Like most hollow-fiber filters, this system is not effective against viruses. For complete protection in questionable water, pair it with a chemical treatment—our Personal Water Decon Kit or Personal Water Purification Tablet Kit round out your water plan and cover what filtration alone can't.
Who it's for
Ideal for military, backpackers, overlanders, and preparedness-minded users who run hydration bladders and want inline, drink-on-demand filtration without swapping to a bottle system.
Backwash periodically to maintain flow. Always follow the manufacturer's instructions for use and maintenance.
Water treatment products must be used strictly according to the manufacturer’s instructions. Improper use may result in ineffective water treatment or potential health risks. Always read and follow all directions, warnings, and safety guidelines provided on the product packaging before use. By purchasing this product, you acknowledge that safe and proper usage is your responsibility. We assume no liability for misuse, improper handling, or failure to follow manufacturer instructions. Your water treatment is your responsibility.
