Backflow Prevention Assemblies Study Guide Questions And Correct Answers

Back Siphonage (City SIde) {Ans: This type of backflow occurs when the pressure from the supply side drops and draws the water from the irrigation system into the water supply.}What causes back siphonage {Ans: A break in the city water main, also when the fire department pumps large quantities of water through the city's water main.}Water Purveyor {Ans: The ________________ is the person or company who gets paid to supply the homeowner with clean potable water, and they are responsible for providing its customers with water that is safe under all foreseeable circumstances. Therefore, the water purveyor is charged with the task of protecting the public water supply, even from hazards originating from the customer's premises}What causes back pressure {Ans: A pump installed downstream the water supply, gravity, and water hammer}Pressure Vacuum Breaker (PVB) {Ans: Prevents back siphonage. Has a spring-loaded check valve which closes when the flow of water stops. Also has a spring-loaded air inlet valve which opens to break the siphon water the pressure drops to 1 psi.}Cross Connection {Ans: Is simply a point on a water system where a polluting substance may come in contact with potable water.}