Over 130 years later and now into its fourth generation, Delany Products is still 100% family owned. The Company has seen many changes along the way starting with the introduction of its first flush valve, the Flushboy, in 1927, which changed the product line forever. In 1948, Doc Delany invented and patented the hallmark feature of all Delany flush valves, the Regulating Screw, allowing a valve to be externally adjusted in the field. In 1956, Doc patented another trademark feature of the Delany valves, the Rubberflex handle. This is still the only non-spring loaded handle on the market today.