The PURA UV1-EPCB combines both ultraviolet disinifection with carbon filtration all in one compact system. The UV1-EPCB is a unique unit that consists of a single slimline housing that holds a UV lamp inside Pura’s exclusive extended pass 0.5 micron carbon block filter. It’s a great single-pass treatment for removal of bacteria and cysts as well as chemical contaminants. The UV1-EPCB is rated for a 1 gallon per minute flow rate.