... appearance, change for your request 3. Long life span and easy operation 4. This type of solar water heater can ... 50mm thickness can conserve the heat for maximum 72 hours Inlet and outlet holeMale G 1/2, 3/4Max pressure0.05 MpaSolar collector ... Magnesium bar,T/P valve,Limber hole,sensor hole,water inlet and outlet hole,electric heater.MODELStainless steel pressurized Solar SystemLoading Qty Size ...