A Fuel Line Coupler securely connects the aeration tool between the secondary fuel filter and the low-pressure fuel pump outlet, this component facilitates accurate fuel aeration testing. Its robust design ensures a tight seal, preventing fuel leaks and maintaining optimal fuel pressure. During the aeration test, the coupler allows for accurate measurement and analysis of fuel flow and aeration levels, which are necessary for diagnosing and preventing fuel system issues.Attributes:• Secure locking mechanism for tight fit.• Facilitates accurate fuel aeration testing.• Robust design to prevent fuel leaks.Applications: A Fuel Line Coupler is used to connect the aeration tool between the secondary fuel filter fuel supply line and the low-pressure fuel pump outlet, ensuring accurate fuel aeration testing.