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The Grundfos Comfort System Hot Water Circulator is a one-pump, one-valve combo that’s typically installed in one hour-without the need to install a return line to the water heater, or an additional electrical connection outside the location of the water heater.
The unit begins working when the timer-activated pump at the hot water tank pushes hot water toward a valve beneath the furthest fixture in the house. The valve connects the hot and cold water supply lines.
As long as the water in the hot line remains cold, the valve stays open and the cold water is sent back to the heater through the cold water line. Hot water stands ready to come out when the tap is turned on. No need for electric service under the sink-a common requirement for other recirculation systems.
*Your actual savings will depend on your current average water usage before installing a circulator, and the number of hours per day the circulator runs.
