What does hot water cost?

[xoggoth]

I was always raised with the notion that one should not use water from the hot tap for cooking or drinks. Can't think why.

[Moscow Mule]

I was always raised with the notion that one should not use water from the hot tap for cooking or drinks. Can't think why.

Because it will have been in the tank for a while and hence subject to any infection which might be present in the system.

Water from the mains is best for cooking and drinking.