How do electric tank water heaters work?
Using up to two electric heating elements, electric tank water heaters work by pushing cold water into the system through a dip tube that delivers it toward the bottom of the tank. This happens whenever a hot water tap is opened. This process moves hot water from the top of the tank out to the pipes, which sends hot water to wherever it's needed in your home. Inside the tank, temperature sensors cue the thermostat to turn on the heating elements if the temperature of the stored hot water drops below the desired temperature.
Electric tank water heaters include several components needed to monitor hot water: a thermostat, a temperature and pressure relief valve, and a drain valve. These together lead to efficient, reliable, and safe operation. To manage the water's temperature and ensure it remains at the specified temperature set on the control, the thermostat cycles the heating elements.