Prepare your semi to be Ready for the Road Ahead™, with the Bendix Remanufactured QR-1C® Quick Release and Double Check Valve that provides a rapid release of air brake pressure. By utilizing a sophisticated design, this replacement valve is able to quickly release compressed air from the brake chambers into the brake shoes, allowing vehicles and trailers to stop or slow as needed. Prepared with durable materials to tolerate extreme pressures. FleetPride is your First Click in Heavy Duty®.