 Even some plumbing fixture manufacturers wouldn't sell their products if they were furnished with Sloan's flushometers.However, the original 1906 design has proven so reliable that as of 2012, parts are still available to repair any flushometer ever made.In addition to its flush valves based on diaphragm technology, Sloan also introduced piston-type flushometers, including the Crown and the GEM 2.