Quick Answer
Berkey test results can be trusted over ProPur's due to independent third-party certifications and a longer history of rigorous testing.
Testing and Certifications
Berkey water filters hold numerous third-party certifications, including NSF/ANSI 53, which tests for a wide range of contaminants, and NSF/ANSI 401, which specifically tests for emerging contaminants like pharmaceuticals and pesticides. These certifications ensure that the Berkey filter meets rigorous standards for contaminant removal. In contrast, ProPur filters do not hold the same level of third-party certifications.
Filter Life and Flow Rate
Berkey filters have a longer filter life, with the Black Berkey filter lasting up to 3,000 gallons, compared to ProPur’s 100-gallon filter life. The Berkey filter also has a higher flow rate, with a maximum flow rate of 2.75 gallons per minute (GPM), compared to ProPur’s 0.5 GPM. This means that Berkey filters can provide a faster and more consistent flow of clean water, making them more suitable for off-grid use.
Testing for Real-World Contaminants
Independent testing has shown that Berkey filters are effective at removing real-world contaminants, including Giardia and Cryptosporidium, which are often found in water sources. Berkey filters have also been tested for their ability to remove lead, mercury, and other heavy metals, and have been shown to be highly effective. While ProPur filters may also claim to remove these contaminants, the lack of third-party certifications and independent testing data makes it difficult to verify their effectiveness.
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