... alloy mould material of high strength with airflow design. pressure solar water heaterWater Tank:1,Inner tank:SUS304-2B material ... tank:0.5mm thickness galvanized steel material4,P/T relief valve ,electrical heater element with terminator5,Heat exchanger:20m long ... pump:WILORS15/6,three phases,220V/50Hz(German)3,Probe:Pressure&Temperature Probe &Check valve4,Temperature sensor:Three temperature sensor ...