[javadog]

Originally Posted by stomachmonkey

It can.

It's not just ambient conditions.

Hot water is different than cold water.

https://math.ucr.edu/home/baez/physics/General/hot_water.html#:~:text=detailed%20explanations%20R eferences-,Yes%20—%20a%20general%20explanation,it%20is%20in% 20fact%20real.

We are talking about water in pipes, so no.

And hot water lines become cold water lines if you don’t run the hot water out one end.