The YELLOW JACKET brand name is synonymous with the highest quality and most complete line of HVAC/R service tools in the industry. The brand's roots go back to 1946 when Ritchie Engineering Company, Inc., a manufacturers' representative organization, became a hose manufacturer. With an emphasis on quality and service, Ritchie Engineering trademarked the hose as the YELLOW JACKET Charging Hose in 1950. Since then, the company has been engineering, manufacturing, and continuously improving the YELLOW JACKET hose while adding new products to its portfolio. Today, YELLOW JACKET products are sold worldwide through a network of authorized HVAC/R wholesalers.