... heater, E-Parts box, thermostat, Switch, Anode magnesium bar, T/P valve, Relief valve, dustproof ring Working Pressure ≥ 6 bar Hail ... as inner tank keeps the water clean and drinkable, automatic argon-arc welding technics ensures no leakage and long ... integrated system composes of intelligent controller, circulating pump, flow meter, relief valve, pressure gauge, expansion vessel, check valve, etc. 2) ...