Have you ever been in a situation where you have turned on the cold water instead of the hot water, for your shower? It typically happens to me at hotels or when I go stay with my parents. Modern bathrooms can come with super-complicated fittings, because manufacturers want to pack in as many features as possible. I remember there was a time when jet-showers were a rage, so along with the main shower, came the super jets on the two side panels. They promised to give you a spa