When Was Indoor Plumbing Invented. Indoor toilets started to show up in british homes in the 1890s but were only found in hotels and wealthy people's homes. With the fall of rome both water supply and sanitation stagnated—or regressed—for well over 1,000 years.
The art and practice of indoor plumbing took nearly a century to develop, starting in about the 1840s. Tremont hotel had some of the best indoor plumbing in the country. In 1767, british inventor william feetham invented the first modern shower.
