The Hendrickson 1/4"NPT Port Height Control Valve with Differential Dump Valve is the perfect solution for controlling the height of your vehicle. This advanced shear-seal design ensures accurate air flow, delivering superior performance and durability. With its high air flow and proportional response, this valve prolongs air spring and shock absorber life by providing a smooth, consistent ride quality. The valve is easy to install and is designed to be used with a variety of air suspension systems. FleetPride is your First Click in Heavy Duty®.