Thetford Corporation, headquartered in Ann Arbor, Mich., provides quality products and services to the manufacturers and users of recreational vehicles throughout the world. This is accomplished through three steps: Product Development and Engineering, Manufacturing and Customer Service. Most Thetford products are available from most RV Dealerships, Camping World outlets, mass-merchant retailers and truck stops around the country. Products include permanent and portable toilets, holding tank products, RV care products, optional accessories and parts. Thetford Corporation has been credited with numerous firsts including in 1968 it introduced the first slide-action valve for RV holding tanks. In 1977 it introduced the first electric flush portable toilet. In 2001 it was the first RV permanent toilet manufacturer to offer a 3-Year Warranty.