All Backflow Devices installed in fire protection system piping must be tested annually. According to the 2008 edition of NFPA 25 -13.6.2.1 (Standard for the inspecting, testing and maintenance of water based fire protection systems) “all backflow devices installed in fire protection system piping must be tested annually”. Section 13.6.3.1 states, “maintenance of all backflow prevention assemblies shall be conducted by a trained individual following the manufacturer’s instructions in accordance with the procedures and policies of the Authority Having Jurisdiction.