Backflow preventers are subject to various certifications and standards, including ASSE 1012, ASSE 1013, and CSA B64. These standards ensure that backflow preventers meet specific requirements for performance, safety, and reliability. When selecting a backflow preventer, it is essential to look for certifications from recognized organizations, such as ASSE International or CSA Group, to ensure compliance with local regulations and codes. Additionally, backflow preventers should be installed, inspected, and maintained in accordance with local regulations and industry best practices.