[f-securus]

I think you would only do it for the hot water input which isn’t potable after it runs through a traditional hot water heater?

[idiotsecant]

Why isn't hot water potable?

[e2e8]

According to the EPA: "Hot water dissolves lead more quickly than cold water and is therefore more likely to contain greater amounts of lead. Never use water from the hot water tap for drinking, cooking, or making baby formula."

The applicability of this advice is probably quite variable.

[0] https://www.epa.gov/lead/why-cant-i-use-hot-water-tap-drinki...