RG - 493Accuracy Testing of Gauges Used for Testing Backflow-Prevention Assemblieshttps://www.tceq.texas.gov/downloads/drinking-water/plan-technical-review/prevention/rg-493.pdf/viewhttps://www.tceq.texas.gov/@@site-logo/TCEQ-logo-header.png
RG - 493
Accuracy Testing of Gauges Used for Testing Backflow-Prevention Assemblies