... working principle CE,ISO9001,SGS,CCC OEM is OK Non-pressurized solar water heater,compactSimple structure and working principleCost-optimalCE,ISO9001,SGS,CCCOEM ... spare parts:Electric heater,magnesium rod,assistant tank,reflectorPacking:Export carton with full foamsRemark:Diameter of solar water tank(mm):360/ ... );150/180/200/240/300/360L(58*1800) New Compact non-pressured solar water heater for 2013