... 2000 4:Produce as customer's requirment Low pressurized solar water heaterSpecifications1.Solar Keymark,SGS,CE,CCC,ISO9001 2.manufacturer, independent ... right 3.OEMIt is one of the most common used solar water heating system for household, hotel, hospital, project ... head. This system matched with vacuum tube solar collector. Water flow inside and complete a circulation on it own without given ...