From Zonums Solutions web site:
Epa2kmz can transform the Network Map or the Network Map and the Hydraulic Analysis.
Epa2kmz wizard interface allows the user to navigate the process of transformation step by step, from the input file to the Google Earth visualization file. If the output visualization is not what you wanted, just click the back button and make the changes, no need to repeat to whole process.
Epa2kmz uses the EPANET Toolkit function library (Epanet2.dll) as the analysis engine. Also it incorporates functions and subroutines from the source code of EPANET.