Viqua D4 UV Water Purification System Destroys 99.99-Percent of illness-causing microorganisms, including E. coli, Cryptosporidium and Giardia Flow Rate: 9 USGPM (34 lpm) Inlet/outlet port size: 3/4-Inch MNPT Electrical: 120 V NPT Application: POE (point-of-entry)