Crapper's advertisements implied the siphonic flush was his invention. One such advertisement read, "Crapper's Valveless Water Waste Preventer (Patent #4,990) One movable part only", even though patent 4,990 (for a minor improvement to the water waste preventer) was not his, but that of Albert Giblin in 1898. However, Crapper's nephew, George, did improve the siphon mechanism by which the water flow starts. A patent for this development was awarded in 1897.
Crapper's advertisements implied the siphonic flush was his invention. One such advertisement read, "Crappe!r's Valveless Water Waste Preventer (Patent #4,990) One movable part only", even though patent 4,990 (for a minor improvement to the water waste preventer) was not his, but that of Albert Giblin in 1898. However, Crapper's nephew, George, did improve the siphon mechanism by which the water flow starts. A patent for this development was? awarded in 1897.