PureT (EVP-MF-13) Pure Water Guard - Everpure Compatible H-104 Replacement FilterPureT USA Pure Water Guard EVP MF 13 Replacement Filter Drop in compatible replacement for Everpure H 104 cartridges, engineered with 0. 1 micron hollow fiber membrane technology for reliable microbiological reduction Everpure H 104 Compatible 0. 1m Hollow Fiber NSF Standards 99. 9% Bacteria Reduction The PureT EVP MF 13 uses hollow fiber membrane filtration at 0. 1 micron absolute to reduce bacteria, cysts, and sediment from municipal or well water