New Geothermal GSHP Piping Systems document available June 28, 2023 PPI MS-7 includes detailed specifications for four plastic piping materials which have been proven in ground-source heat exchange systems: HDPE, PE-RT, PEX, and PP (PP-R and PP-RCT). Read More
HydroSketch 2.0 now available November 11, 2021 The original version of HydroSketch will remain supported through the end of 2021. Read More