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First flush toilet is invented
http://www.historic-uk.com/CultureUK/The-Throne-of-Sir-John-Harrington/The invention was made by a non-succesful poet by the name of Sir John Harrington. The exact date of it's invetion is unknown, yet it was tested by Queen Elizabeth I in 1592. She was impressed and demanded she had one herself! -
Cummings improves toilet design
http://www.historic-uk.com/CultureUK/The-Throne-of-Sir-John-Harrington/ The Toilet, still not universally used, is improved upon by Alexander Cummings. He adds a design called an "S-trap". The "S-trap" design is still in use today. -
First one peice ceramic toilet by Thomas Twyford
http://en.wikipedia.org/wiki/Flush_toilet#History
Thomas Twyford invents the first one peice ceramic flush toilet. -
Bruce Thompsom developes Duoset
http://en.wikipedia.org/wiki/Flush_toilet#History
Bruce Thompson invents a toilet that is more water effiecient, were the toilet can use 2 different amounts of water. On average, it saves a household 67% of their normal water usage.