electric water-heater tank [1]
high-temperature cutoff 
Mechanism cutting off the flow of electric current when the temperature of the water exceeds a set value.
overflow pipe 
Pipe through which water escapes when maximum pressure is exceeded.
pressure relief valve 
Device for lowering the pressure inside the tank by releasing excess hot water.
drain valve 
Device for emptying water from the tank.
electric supply 
Point where the hot-water tank connects with the household circuit.
access panel 
upper thermostat 
Device that senses changes in temperature and automatically switches the upper heating element on or off.
hot-water outlet 
Outlet pipe for hot water flowing into the hot-water circuit.
cold-water supply 
Inlet pipe for cold water to the tank.