Your parents were correct about the advice, but wrong about the reasoning. Possibly hot water leaches out lead easier, but it’s more about water sitting in a ho

Your parents were correct about the advice, but wrong about the reasoning. Possibly hot water leaches out lead easier, but it’s more about water sitting in a hot water tank. Hot water in a home usually sits in a metal tank that is full of scale/minerals. Once the sacrificial anode is used up (maybe 1% of people actually replace their anode when needed), the tank begins corroding. Hot water is for washing things, cold water is for consumption.