... ISO9001,ISO14001,CCC,CE,Solar Keymark 2.solar water heater:heat pipe tube 3.pressure:press Solar water heater: material:1.volume of storage ... tank,fluorin titanium plate,thickness:0.4mm inner tank,stainless steel SUS304-2B,thickness:1.2-1.5mm,normal working pressure ... electric booster as to provide hot water without sunshine.3.Superior heat preservation ensured by one-off molding polyurethane foam with ...