... heating rods, safety relief valves, extra-thick insulation, energy efficient5, fault self-test6, with anti-electric wall device ... .50.730~75530*230*11201260*365*590Wall Mounted Electric water heater core technologyEnameled inner tank: material- Aluminum and ... To apply eight systems insure the security of electric water heater:1. protection of Water is completely separated from electricity by double ...