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I use time of day billing with my utility company to get lower rates during off peak hours. I installed a hot water circulator on my water heater to reduce water waste waiting for hot water at the tap. But I set the circulator timer to run 15 minutes every hour during peak rate hours, which caused the water heater to turn on every hour even when we weren’t using hot water! By turning off the circulator during the 8 hours of peak time the water heater only turns on if we use hot water….