Hello Paul, Ø The 2” domestic backflow assembly will need to be replaced with a USC approved assembly and tested. The existing assembly is not on the current USC approved list. A licensed plumber will need to install the assembly and pull a permit with Building Inspections. Ø The fire service will need to be replaced with a USC approved DCDA (Double Check Detector Assembly)and tested as well. An approved Fire Sprinkler contractor will need to install the assembly and pull a permit with Building Inspections. It can be placed in the existing fire vault. Ø Dave informed me that he received a call from PCI wanting to know what was required by us. I have asked Dave to informed PCI of our requirements. Ø I have attached a list of backflow testers registered with Addison. Please let me know if you have any questions. Regards PHIL KAGARICE | UTILITIES SUPERVISOR / WATER QUALITY Addison Service Center | 16801 Westgrove Dr. | Addison TX 75001 ofc 972.661.3160| fax 972.716.0834 | pkagarice@addisontx.gov