... backflow when the hot and cold water have pressure difference.• CE approved• Easy installation Installation Guide Accessories Touch panelHost boxAdapterBatteryProduct ... control panel. System will shutdown automatically. System has the memory function, water TEMP will be same as that you set ... to a number of product certification, such as CCC, CQC, CE, UL, ETL, TUV, GS, CAS, ROHS etc.. Today, Foshan ...