What design feature is used to minimize potable water wastage associated with hot water distribution piping for a potable water system?

Correct Answer: Option A — Use of hot water recirculation loops.

Hot water recirculation loops keep water moving through the distribution piping, ensuring hot water is immediately available at fixtures. This design eliminates the need to run taps for extended periods while waiting for hot water to arrive from the heater, significantly reducing potable water wastage.