The SERTO screwed connection K 70009 is a specialized connection fitting designed for leak pipe K 70006 in the fuel transfer pump system of the Sulzer ZV40/48 engine. Its main function is to establish a secure, pressure-resistant, and leak-free connection between the leak pipe and fuel system components, ensuring reliable leakage monitoring and controlled fuel drainage. Engineered from high-strength, corrosion-resistant materials compatible with diesel fuel applications, the fitting is capable of withstanding vibration, thermal cycling, and continuous mechanical loading. Precision manufacturing provides accurate thread engagement and reliable sealing throughout prolonged service intervals. By maintaining the integrity of the fuel leakage monitoring system, the K 70009 SERTO screwed connection contributes to improved operational safety, environmental protection, preventive maintenance, and dependable long-term engine performance.