The Haldex 1/4" Air Brake Inversion Valve is designed to provide reliable and efficient control of spring brakes on trucks and tractors. This valve is designed to detect primary reservoir air system failure, allowing for modulated control of spring brakes. This valve is interchangeable with competitive models without the anti-compounding feature, making it a great choice for those looking for a reliable and efficient air brake inversion valve. FleetPride is your First Click in Heavy Duty®.