MSR Guardian Water Purifier
- 2.5 liters per minute maximum flow
- 10000 liters listed capacity
- 1000 ppm maximum TDS level supported
- Hollow fiber membrane purification
- Hand powered, portable
- 0.49 kg item weight
- 5.25 x 5 x 12.25 inches
- Storage bag included with the purifier
Last refreshed Sep 7, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
Groups and emergency kits get a hand powered hollow fiber purifier with a fast stated flow rate. The listing does not say which contaminants it removes, so confirm that before relying on it abroad.
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ASIN: B019ERWU66Category: Camping Water Filters
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Overview
Backcountry hikers, global travelers and emergency planners get a hand powered purifier that pushes water through a hollow fiber membrane. The unit packs into its included storage bag and needs no power source beyond the user's own effort.
Flow speed and a long listed capacity make the Guardian a candidate for groups who treat a lot of water each day. The spec sheet never names the organisms or chemicals it addresses and lists no hoses or bottle adapters, so the full kit has to be checked with the seller.
Who it's for
Trail groups, travelers and households stocking a preparedness kit who want to process water by hand fit the profile. Solo hikers chasing minimum pack weight should weigh its bulk first.
Pros and cons
- Fast listed flow rate
- Hand powered, no batteries
- Long listed capacity
- Hollow fiber membrane
- Removed contaminants not listed
- Hoses and adapters absent from components
- Bulky for a solo ultralight kit
Performance notes
Output depends on pumping effort and how clean the membrane stays, since silty water slows flow as the hollow fibers load up. Starting with the clearest source available and keeping the membrane clean preserves the stated rate.
Specifications
| Brand | MSR |
|---|---|
| Dimensions & fit | |
| Item weight | 1.08 pounds |
| Item Dimensions L x W x H | 5.2 × 5 × 12.2 inches |
| Capacity & performance | |
| Maximum Flow Rate | 0.7 gpm |
| Power & efficiency | |
| Power Source | Corded Electric |
| Construction & materials | |
| Material Type | Hollow Fiber |
| Compatibility & installation | |
| Installation Type | Portable |
| Included components | |
| Included Components | Water Purifier, Storage Bag |
| Warranty & support | |
| Supported Water TDS Level Maximum PPM | 1000 ppm |
| Other details | |
| Purification Method | Hollow Fiber Membrane |
| Container Type | Storage Bag |
| Other Special Features of the Product | Lightweight, Portable |
Frequently asked questions
How do I set up the MSR Guardian purifier?
The listing names only the purifier and a storage bag as included, with a hand powered power source. No setup steps, hoses or bottle adapters are listed, so check the manual for connection details.
What does the MSR Guardian remove from water?
The specs list hollow fiber membrane purification but do not name the bacteria, viruses or other contaminants it targets.
What does the 10000 liter capacity on the MSR Guardian mean?
The specs list a capacity of 10000 liters without saying whether that is total filter life or another measure.
Can the MSR Guardian treat salt water?
The listing gives a maximum supported TDS level of 1000 ppm and does not mention seawater.