In a European-style suction system, the check valve is located _____.

• A. Inside the pump
• B. Where the top of the piping meets the bottom of the dispenser
• C. At the tank exit
• D. At the bottom of the fuel line

Answer: (B)

In a European-style suction system, the check valve is placed at the junction where the top of the piping meets the bottom of the dispenser. This position blocks any reverse flow from the dispenser back into the suction line when the pump stops or pressure changes, which helps keep the line primed and prevents siphoning. If the valve were inside the pump, at the tank exit, or at the bottom of the fuel line, backflow could still occur or the line wouldn’t be effectively isolated as the dispenser operates, leading to prime loss, drips, or vapor issues. Placing the valve at the junction with the dispenser ensures proper isolation and quick restart readiness.