The WG9000360507 Check Valve is a cornerstone of the Sinotruk howo parts ecosystem, designed to safeguard your vehicle’s pneumatic circuits against dangerous backflow. Whether you are operating a HOWO 371 or a newer T7H model, this check valve (also known as a non-return valve) ensures that compressed air moves in a single direction—maintaining the pressure required for consistent braking and air suspension performance. Manufactured …