Product Details: Prepare your semi truck to be Ready for the Road Ahead™, with the Bendix AD-SP® Purge Valve Kit that provides a fresh new purge valve for the pneumatic system. Thanks to its specialized design, this replacement device is able to expel the contaminated air that has been captured in the pneumatic system. Built with top-quality materials to withstand high pressures and extreme conditions. FleetPride is your First Click in Heavy Duty®.