Taco’s HotLink system for domestic hot water recirculation is designed for systems without dedicated hot water return lines. The system ensures instant hot water to showers and faucets by maintaining hot water at each fixture while returning the cooled hot water back to the water heater through the cold water line. Its thermal disk closes when hot water reaches the valve. An integral flow check prevents cold water from backing into the hot line. It is packaged with the Hot-Link valve, stainless-steel braided flex lines, a Hot-Link circulator and a bronze water heater connector.