How does a hot water heater circulation?

Energy-saving is an very important function of a water heater that customer will take into consideration. In normally, the hot water being stored in a tank and gradually cooled after a time. With the water heater, the cooled water in the storage tank can be exchanged with the cold water by way of heat exchange, so that the heat can be recycled again and energy can be saved. A micro water pump play a very important role in this kinds of way. A eletric water pump keeps hot water moving throughout the plumbing system so that it's always available in an instant. Because is the heating circulation pump in water heater do exchange the cooled water into hot water when using the water heater,it re-routes the cold water back to the storage tank to be heated. Basically, it creates a loop from the tap to the hot water system and back again, on a continual basis, that also called instant water heater.