... CCC,CE,ISO9001:2000 4:Produce as customer's requirment Low pressurized solar water heaterSpecifications1.Solar Keymark,SGS,CE,CCC, ... be installed on the roof to get enough water flow pressure, because the compact system is non-pressurized, water flow ... : 50mm - 60mm7) Inner tank thickness of: 0.4mm - 0.5mm8) Tank diameter: 46eter: 46eter: 460mm9) Pressure: 0Pa10) Heat preservation: 72hrs11) Hail ...