Chapter 13.10 CROSS CONNECTIONS AND BACKFLOW PREVENTION PROGRAM This chapter is included in your selections. Sections: 13.10.010 Definitions. 13.10.020 Purpose. 13.10.030 Backflow prevention. 13.10.040 Responsibilities. 13.10.050 Certified backflow assembly testers. 13.10.060 Enforcement – Penalty. 13.10.070 Conformance with state codes.