How does a hot water recirculation pump work?

A hot water recirculation system is a continuous loop of slow-moving warm water that constantly circulates hot water through the pipes from the hot water heater to the furthest fixture. The water is always hot in the pipes and no water is wasted during the wait. As water begins to cool in the hot water line, the recirculation pump will then move the hot water from the heater throughout the pipe back to the hot water heater, creating a continual move of water that is instantly available for use with no waste.