Product Details: The Hadley Height Control Valve with Pressure Dump Valve is the perfect solution for any performance configuration. This universal design allows it to fit most applications, providing a perfect balance of reliability and repeatability. The model rate flow rate ensures consistent lubrication to protect the valve, while the superior lubricants provide proven O-ring seal integrity throughout the life of the valve. With its easy installation and superior performance. FleetPride is your First Click in Heavy Duty®.