Equip your vehicle with the replacement parts it needs to be Ready for the Road Ahead™, with the Hendrickson 1/8" NPT Automatic Dump Valve that is suitable for a wide range of pneumatic operations. This replacement valve is designed to regulate the air supply within the hydraulic system. Crafted with durable parts for extended use in regularly active and idle vehicles. FleetPride is your First Click in Heavy Duty®.