eli5 Why is it that when you change the water from tub mode to shower mode that the water comes out cold at first?
In: 2
The water from the water heater has to reach the shower head regardless if water is standing in the line to the shower head or not. There’s still water in the piping that has exited the heater and has cooled off. That water has to be pushed out of the way. And we have to think about whether the heater is above or below (in a basement) the shower.
Latest Answers