Water Heater 1.solar tank with CE,PED, CCC,ROHS approved ... solar tank 3.High international standard solar tank Water Heater(Hydronic Plus) is a combination of a water sylinder ... , there are solar controller, water pump, expansion tank, valves and pipes. Customer just need to connect the hydronic plus ... the solar collector and sensors, then a solar water heater is ready. This is very easy and flexible to ...