Q: What is hot water recirculation?

A: A hot water recirculation system uses a small pump attached to the hot water line to a home’s showers, tubs, and faucets that circulates cold water out of the line to deliver hot water faster and mitigates the amount of water wasted as you wait for it to heat up (called lag time). Often activated by a switch or button in the kitchen or baths, the system can reduce lag time to a matter of seconds instead of minutes, reducing water use at those locations by 30 percent or more.