... SGS,CCC OEM is OK Non-pressurized solar water heater,compactSimple structure and working principleCost-optimalCE,ISO9001,SGS ... JNYL),50-60mm(JNQG)Optional spare parts:Electric heater,magnesium rod,assistant tank,reflectorPacking:Export carton ... with full foamsRemark:Diameter of solar water tank(mm):360/460Vent connection(inch):1/ ... 1800) New Compact non-pressured solar water heater for 2013