Thomas Crapper (baptised 28 September 1836; died 27 January 1910) was a plumber who founded Thomas Crapper & Co. in London. Contrary to widespread misconceptions, Crapper did not invent the flush toilet. He did, however, do much to increase the popularity of the toilet, and developed some important related inventions, such as the ballcock. He was noted for the quality of his products and received several Royal Warrants.
The manhole covers with Crapper's company's name on them in Westminster Abbey are now a minor tourist attraction.
Crapper was born in Thorne, Yorkshire, in 1836; the exact date is unknown, but he was baptised on 28 September 1836. His father, Charles, was a sailor. In 1853 he was apprenticed to his brother George, who was a master plumber in Chelsea. After his apprenticeship and three years as a journeyman plumber, in 1861 Crapper set himself up as a sanitary engineer, with his own brass foundry and workshops in nearby Marlborough Road.