... Solar water heater 1.CE,ISO,SGS ,solar keymark 2.Low pressure,standard SRCC 3.High Quanlity&Reasonable Price SpecificationsSolar water heater ... (1)CE,ISO,SGS ,solar keymark (2)Low pressure,standard SRCC(3)High Quanlity&Reasonable Pricesolar water heaterWe are ... of : 0.4mm - 0.5mm 8) Tank diameter : 460mm9) Pressure : 0Pa 10) Heat preservation : 72hrs 11) Hail resistance: 25mm