APR211C — Plumbing Backflow Prevention
APR 211C - Plumbing Backflow Prevention APR 211C - Plumbing Backflow Prevention 4 Credit(s) Course Description: Introduces the principles and hazards of backflow prevention, and reviews different types of vents that can be installed in a drain, waste and vent system. It also covers corrosive waste and reviews the safety issues and hazard communications. Course Learning