Ensure your semi is Ready for the Road Ahead with enhanced control of its braking system, with the Bendix PP-1 Series 1/8 "-27 NPT Push to Connect Type Dash Control Valve. Thanks to its sophisticated design, this replacement valve is able to regulate how much brake pressure is applied to the wheels by controlling the flow of compressed air to various parts of brake system. Crafted with a durable design to withstand extreme pressures and idle operations. FleetPride is your First Click in Heavy Duty .