D&H United Fueling Solutions is the leading provider of services for vehicle fueling and EV charging systems. The company provides testing/compliance, repair/maintenance and installation services as well as equipment and parts sales. D&H United is an authorized distributor and service provider for Gilbarco Veeder-Root, OPW, Franklin as well as other major equipment brands. The company has 33 offices and 1100+ employees operating across the country. D&H United provides testing, inspection and compliance through its Tanknology, Valley Tank Testing and PS&C divisions.