NCH Corporation is a international marketer of maintenance products, and one of the largest companies in the world to sell such products through direct marketing. NCHs products include specialty chemicals, industrial maintenance supplies, pet products, and plumbing parts. These products are sold through a number of wholly owned subsidiaries, many of which are engaged in the maintenance products business. Subsidiary companies in NCHs Chemical Specialties Division include National Chemsearch and Certified Laboratories. These companies offer customers in diverse industries a wide range of value added cost saving maintenance products and services including industrial drain and waste biologicals, oils and lubricants, and industrial maintenance chemicals. The Division also includes the following subsidiaries; X-Chem / Terra Services, an oil field chemical products and services division; Pure Solve, a partswashing service business; and Chem-Aqua, a water treatment service business. Companies in the Partsmaster group offer a wide variety of items for maintenance and repair, including welding supplies and fasteners. The Plumbing Products Group provides plumbing supplies for the do-it-yourself retail consumer and the OEM market. The Retail Products Group markets a wide range of pet supplies. NCH has over 8,500 employees. Its branch offices and manufacturing plants are located on six continents, and its products are sold in over 50 different countries. Revenue for fiscal year 2013 exceeded $1 billion. National Disinfectant Company, the original incarnation of NCH Corporation, was founded in Dallas, Texas, by Milton P. Levy in 1919. Leadership of the company has remained in the hands of the Levy family to this day. National Disinfectants original line of products was fairly small; it included a coal tar disinfectant, an insecticide, and a liquid hand soap for institutional use. The company was a small, efficient operation, and orders received in the morning would be delivered in the afternoon of the same day. During the next couple of decades the companys offerings grew. One brand that appeared in the late 1930s was Everbrite, a heavy-duty industrial floor wax. Everbrite has continued to exist in varying forms since then, eventually evolving into a strong multi-purpose cleaner that kills bacteria. Levys three sons, Lester A., Milton P., Jr., and Irvin L., were involved in the companys operations from early on, working in the warehouse and shipping areas as teenagers and learning the business from the ground up. When the senior Levy died in 1946, the family was prepared to continue running National Disinfectant. Levys widow, Ruth, took over as president of the company. Lester Levy was placed in charge of the companys small but growing sales crew. Milton, Jr., began to integrate the development of a sales territory in Austin, Texas, with the completion of his studies there at the University of Texas. Irvin, after working part-time as office manager while he finished school at Southern Methodist University, began developing another sales area in the Dallas-Fort Worth region. In 1947 company sales were $300,000. The Levys were assisted in running the company by Jack Mann, National Disinfectants top sales representative since joining the company in the 1920s. Mann, a former vaudeville entertainer and a close friend of Milton, Sr., would stay with the company for 40 years. The companys Mantek chemical division was named after him shortly after his death in 1968.