Check valves to prevent back siphonage are required by law in which state?

• A. California
• B. New Jersey
• C. New York
• D. Texas

Answer: (B)

The main idea here is preventing backflow from pesticide equipment into the water supply. Back siphonage happens when water pressure in a supply line drops and liquid from the spray tank could be drawn back into the drinking water system. A check valve or anti-siphon device on the fill line or on the equipment stops this reverse flow, protecting water supplies from contamination. New Jersey state law explicitly requires these devices to prevent back siphage when applying pesticides, so it’s the state that has a legal mandate for this practice. Other states may have their own rules or recommendations in certain contexts, but the question focuses on the state with a statewide legal requirement, which is New Jersey.