... ,SRCC,ISO,SGS 2013 Split Pressure Solar Water Heater Made in China The composition of the system: The solar water heating systerm ... vacuum heat collector is used ,no water in the tube ,no bursting and could be used as usual under minus 50 Degrees Celsius ... .Life span:Approximate 15 years 4.We can customize according to customers' requirement Certificates :CE,ISO9001,SRCC,Solar keymark,CCC,SGS ...