Why does such a small turn of the hot water faucet in the shower result in such a drastic change in temperature?
In: Engineering
I would also add that the valves are typically threaded, like a screw. However, where screws usually have a very fine pitch (i.e., there are lots of threads on them–think about how long it can take to manually drive a screw into wood or the like!), a valve in your shower or faucets is a very steep pitch. You know this, since it takes less than one full rotation of a faucet to open the valve fully. Therefore, even a slight adjustment is moving the internals of the valve a significant way toward being fully open for one temp or another
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