AquaMotion’s Hot Two recirculation system delivers instant or user-controlled hot water with eco-friendly energy savings. It is installed at the water tank in systems that have a dedicated return line, allowing hot water recirculation without crossing over to the cold water line. The system works automatically by sensing water temperature and only running when necessary, saving up to 15,000 gallons of water a year while using less than $5 a year in operating costs.