The Haldex 1/8" NPT Height Control Valve Dump Valve is a reliable and durable valve designed to provide superior performance and safety. This valve is engineered to strict OE specifications and features all ports with 1/8" NPT fittings, as well as 1/4" and 3/8" fittings provided. The valve is pilot operated via a switch, and when pressure is applied to the pilot port, the dump valve releases air from the air spring. This valve is perfect for any application requiring reliable and safe height control. FleetPride is your First Click in Heavy Duty®.