USC BACKFLOW TESTING PROCEDURES
University of Southern California Foundation for Cross-Connection Control and Hydraulic Research
10th Edition Testing Procedures for the Reduced Pressure Principle, Double Check, Pressure Vacuum Breaker, and Spill Resistant Vacuum Breaker Backflow Assemblies.
Click on links below for backflow assembly testing procedures:
Reduced Pressure Principle Backflow Assembly
Double Check Backflow Assembly
Pressure Vacuum Breaker
Spill Resistant Vacuum Breaker