“Hot water as an instrument of prevention and daily hygienic attention has been part of the uses of our society for a few decades” remembers Domitilla Dardi, design historian and author, with Carlo Martino, of the beautiful volume, dated 2011 but still relevant, Il bagno che verrà (The Bathroom to be) published by Catalano, the sanitary company. “We should remember that not long ago Totò stigmatized reticence to cleanliness in one of his most famous jokes: “Only those who are dirty need to wash”. Also, in the first half of the twentieth century, Dardi recalls, it was the American mechanized bathroom that compacted functions, finally becoming democratic and accessible to all social classes and making the hotel fortune. Which, for the first time, were able to guarantee “a room, a bathroom” thanks to a standard that provided for placing the connections all on the same wall and in a column in the vertical distribution, a system that was then also adopted in private apartments.