Leonard Valve officially began manufacturing thermostatic mixing valves in 1911, and was incorporated in 1913. The founder, Frederick C. Leonard, was a watch repairman and electrician, among his many talents. Since this initial development by Mr. Leonard, his successors in the Wilcox family have been devoted to supplying quality mixing valves for numerous commercial applications. Leonard Valve has evolved using the same core principles and modern technologies that were the staple of the company when it was formed. Today they supply high/low master mixers, complete water tempering systems, emergency mixing valves, and shower valves, along with a myriad of other valve products to meet the stringent demands of today’s commercial buildings. Today, Leonard Valve operates from two facilities in Cranston, Rhode Island, where we have a state-of-the-art machining facility with assembly departments that individually assemble and test each mixing valve and every valve system before shipment; and the second facilty being a warehouse.