What's the difference between a water filter and a water purifier
Filter vs. purifier
What is the difference?
There are two different standards in the water filter industry for classifying water treatment devices.
A water filter must remove at least 99.99% of pathogenic bacteria. This is known as a log 4 reduction.
A water purifier must remove at least 99.9999% of pathogenic bacteria (log 6 reduction). Additionally the water purifier must be capable of reducing viruses by at least 99.99% (log 4 reduction)
Filter vs. purifier
Pure Filters
All Pure Filters systems containing the Coldstream FTO+ water filters are classified as Water Purifiers. Pure Filters Water Purifiers meet the water filter industry standard and attain a 99.9999% (log 6 reduction) removal of pathogenic bacteria. This was tested with Klebsiella terrigena at an initial concentration of 3.28646x10⁸ CFU/L, with a total reduction to less than 1 CFU/L, fully meeting the standards for water purifiers. The data confirms a (log 4 reduction) 99.99% for viruses, tested with Rotavirus spp. Coldstream FTO+ filters are one of the very few water filters capable of removing viruses from the source water. For the complete testing data please the lab test results page.
Filter vs. purifier
Why do we call them filters?
Since most people search for water filter or purification systems on the internet with search terms such as water filter, water filters or water filtration, we use the terms filter/filtration and purifier/purification interchangeably on our website with respect to the Pure Filters Water Purifiers and the Coldstream FTO+ water filters. Anytime we use the term filter/filtration in respect to the Coldstream FTO+ water filters or Pure Filters Water Purifiers we are always actually signifying purifier/purification.