... solar water heater SOLAR KEY MARK and SRCC Certificate We provide Solar Water Heater, Water Heater, solar collector, Hot Water Heater, solar hot water, Solar Water Heaters, solar energy heater, Solar Energy Water Heater, Solar Heat Collector, Hot Collector, Solar Water, pressuried solar heater, Solar ... equipment, the life time will be much longer to ensure better using * Material a) Inner water tank ...