Our purifiers are tested by an independent EPA-registered laboratory for safety, efficacy, and longevity. Our 2.5 inch purifier has a lifespan of 75 gallons, and our 6.5 inch gravity purifier is effective for over 200 gallons of use.
Your RapidPure Purifier has been certified to maintain its efficacy to the above volumes, however overall water quality will impact actual useful life depending on the turbidity or suspended particulates in the source water. As the cartridge nears the end of its usefulness it will become harder to drink as it begins to load up from the pathogens and impurities it is protecting you against.
We recommend the following guidelines for changing your purification cartridge:
1) When your RapidPure Purifier becomes noticeably slower or more difficult to drink from this is the simplest indication it’s time for a change.
2) For maximum virus reduction efficacy you should change your 2.5 inch cartridge every 300 liters or, once every 75 days of use, based on 1 gallon (or 4 liters) per day. For the 6.5 inch gravity purifier, you should change the cartridge every 500 liters or 200 days of use based on 1 gallon (or 4 liters) per day.
It is a good habit to begin any new adventure with a fresh cartridge to provide maximum protection, ensure ease of use, and provide peace of mind knowing you’re prepared. We also suggest to always pack a spare cartridge as source water is ever changing.