What is a “backflow prevention device” intended for?
A. A plumbing system that creates three separate drains for a three-compartment sink
B. Adjusting the water pressure in a dishwasher
C. To ensure the proper concentration of sanitizing and cleaning agents
D. Preventing cross-connection
Answer:D
What is a “backflow prevention device” intended for?
A. A plumbing system that creates three separate drains for a three-compartment sink B. Adjusting the water pressure in a dishwasher C. To ensure the proper concentration of sanitizing and cleaning agents D. Preventing cross-connection
Explanation: “Backflow” causes a “cross-connection”. Both of these terms are often misunderstood by students of ServSafe. And there will probably be questions on your exam about these concepts. Cross-connection is similar to “cross-contamination” but it refers to something specific. A cross-connection occurs when a faucet, hose, or other plumbing fixture that provides clean water is mistakenly connected to dirty water. To prevent backflow and cross-connection, there should never be any direct connections between clean water and dirty water. The two most common ways to prevent backflow is an “air-gap” or a “backflow prevention device”. An air-gap is simply allowed a space of air between the clean water and the dirty water. Or never submerging a hose into the bucket of mop water. A backflow prevention device is a plumbing fixture with valves that keeps water moving in only one direction – and never backward.