A water heater is a device designed to heat and store or instantly supply hot water for domestic, commercial, and industrial applications. It consists of a water storage tank or heating chamber, electric heating element or gas burner, thermostat, temperature and pressure relief valve, insulation, inlet and outlet connections, and a protective outer casing. The thermostat automatically regulates the water temperature by controlling the heating element or burner, while safety devices prevent overheating and excessive pressure. Modern water heaters are designed for energy efficiency, reliable performance, and continuous hot water supply.

Operation:
During operation, cold water enters the heater through the inlet connection and is heated by the electric element or gas burner to the preset temperature controlled by the thermostat. Once the desired temperature is reached, the thermostat switches the heating source off and automatically reactivates it when the water temperature falls. Heated water is delivered through the outlet as required, while the temperature and pressure relief valve protects the unit from excessive pressure buildup. Regular inspection of the heating element, thermostat, relief valve, and periodic cleaning of sediment deposits help maintain safe, efficient, and reliable operation.