I recently replaced my 19 year old Trane Geothermal heat pump with a ClimateMaster Tranquility TE038. So far everything works perfect, and the unit is much quieter than the Trane. But I received a phone call from the Installer stating that they were notified by CM that the Flow Reduction valve needs to be replaced with a ball valve because the FR valve could leak and flood the basement. They went on to say that this is only applicable to open Loop systems. I tried to call ClimateMaster to get details, but have yet to receive a response. Does anyone know if this is an inherent design issue with these units? Will changing to a ball valve affect efficiency?