... keymark ,SRCC,ISO,SGS 2013 Split Pressure Solar Water Heater Made in China The composition of the system: The solar water heating systerm ... under minus 50 Degrees Celsius .6.The water tank applies with the enamel internal bladder ,runs under pressure .7. Provide the ... ,SRCC,Solar keymark,SGS,CCC3.Life span:Approximate 15 years 4.We can customize according to customers' requirement Certificates :CE, ...