MSR AutoFlow Gravity Filter Replacement Cartridge

You should replace the cartridge once you have reached its 1,500-liter capacity or if the flow rate remains significantly slow even after performing a thorough backflush in the field. If you notice any damage to the housing or if the filter has been subjected to freezing temperatures while wet, it should also be replaced immediately.

Yes, this cartridge is designed for field maintenance. You can easily backflush the system using clean water to clear out sediment and restore the flow rate, which helps extend the life of the filter during longer trips.

The MSR AutoFlow uses hollow fiber technology designed to remove bacteria and protozoa, meeting EPA standards for these contaminants. However, it is not a purifier and does not remove viruses, so you should use it in water sources where viral contamination is not a concern.

This replacement cartridge is specifically designed for the MSR AutoFlow Gravity Filter system. It is not universally compatible with other MSR filtration models, so please verify your specific system model before purchasing.

After your trip, backflush the filter thoroughly and allow it to air dry completely in a clean, shaded area. Once dry, store it in a cool, dry place, ensuring it is protected from freezing temperatures, which can damage the hollow fibers inside.