In 1596, Sir John Harington published 'A New Discourse of a Stale Subject, Called the Metamorphosis of Ajax,' describing the forerunner to the modern flush toilet. Harington, a godson of Queen Elizabeth I, had devised and installed the first working prototype of a flushing lavatory in Kelston during his exile between 1584 and 1591. The invention, which he proudly named 'Ajax' (a pun on 'a jakes', the slang term for a privy), represented a revolutionary leap in sanitation technology and plumbing.
What it is
The 'Ajax' was the world's first flush toilet featuring a release valve to wash down the pan. It consisted of a bowl with an opening at the bottom, sealed with a leather-faced valve. A cistern of water sat above the bowl, connected by a system of handles, levers, and weights. When the handle was pulled, it released water from the cistern to wash out the bowl while simultaneously opening the bottom valve to empty the contents into a cesspool below, keeping sewer gases from rising back up.
How it came to be
Sir John Harington was banished from the court of Queen Elizabeth I for translating and telling risqué stories, exiling him to Kelston in Somerset. During his exile, he designed and built a grand house, incorporating his new sanitation device to solve the unpleasant odor of traditional privies. When the Queen forgave him and visited his home in 1592, she tried the invention herself. Extremely impressed by its utility, she ordered a model to be built and installed at her royal residence in Richmond Palace.
How many it sold
Despite the Queen's personal endorsement and royal installation at Richmond Palace, the flushing toilet was not a commercial success in its time. The public and builders remained faithful to traditional chamber-pots and privies. Only two units are confirmed to have been built and installed during Harington's lifetime—one for himself at Kelston and one for the Queen. It would take nearly two centuries, and the addition of the S-trap by Alexander Cumming in 1775, for the flushing toilet to be widely adopted.
Why it resonated
While the physical invention failed to capture the public's immediate adoption due to the lack of indoor plumbing and water infrastructure, the publication describing it, 'The Metamorphosis of Ajax', caused a sensation. The book was a satirical, coded attack on the court and political figures, hidden beneath a discourse on sanitation. It resonated for its wit, humor, and daring critique, leading to Harington being briefly banished from court once again.
Impact today
Sir John Harington's invention laid the foundation for modern indoor plumbing and global sanitation systems. Today, the flush toilet is recognized as one of the most critical public health innovations in human history, preventing the spread of waterborne diseases and enabling high-density urban living. Sir John is immortalized in popular culture as the namesake of the English nickname for the toilet, 'the John'.
Historical content researched and generated by Gemini 2.5 Pro.