Taco’s hot water recirc systems are designed to conserve water and increase comfort by reducing delivery time of hot water to outlet fixtures. Products for new construction piping with a dedicated return line include Plumb n’ Plug (digital or analog), Smart Plus and TacoGenie. For retrofits using existing plumbing, Hot-Link and TacoGenie (with optional undersink installation kit) use the cold-water line to complete the recirc loop.