The UVB2-EPCB/SD is a double-canister undersink unit with Pura's extended pass carbon block filter. It's a drinking water filter with a one gallon per minute disinfection capacity. It is capable of serious chemical reduction as well as purification. The 0.5 micron carbon block filter is tight enough to assure cyst removal. Our double model provides you with additional filtration for removal of heavy sediments and/or chemical contaminants.This unit is rated for cyst removal with 0.5 Micron Pentek EPCB cartridge.