Welcome to DOMCO Plumbing, Inc.! Founded in 1993 by Dominic Stone, DOMCO Plumbing, Inc. started as a ?new construction? plumbing company with one owner-operated truck. While working in the rapidly growing El Dorado Hills and Cameron Park subdivisions, Dominic also began acquiring a service clientele. In 1997 he hired another new construction plumber and started taking service calls as a sideline. Word of mouth brought more service customers and, in turn, the need for more service plumbers.