Established for over 40 years, Studor is an international group of companies specialising solely in technologies related to drainage pressures. We are the world market leader and the only specialist manufacturer in this field. Our expertise within the industry has led to Studor being instrumental in the introduction of international standards for the manufacture and installation of Air Admittance Valves (AAVs) worldwide. Studor provides drainage venting solutions through innovation of products, dedicated for the ventilation requirements of the building drainage system and the protection of the water traps seals within those systems, the only barrier between the drainage system and the living space. The Studor AAV was initially developed by Sture Ericson during the early 1970s. Since that time the Studor AAVs have undergone continual improvement and development to ensure that they meet the highest of international standards. Millions of Studor AAVs have been sold worldwide. Studor has a widely-spread international network of distributors, which are supported by our International Sales and Technical Support Teams, all of which are dedicated to the highest levels of Customer Service. Studor is committed to supporting the plumbing industry and works closely with international standards bodies and testing institutes. http://www.studor.net