Prevent water vapors and contaminants from leading to brake malfunctions, with the WABCO SS1200UP Air Dryer that ensures you're Ready for the Road Ahead®. To prevent contaminants from entering your wet and supply tanks, this air dryer utilizes a filtering desiccant element that removes moisture from the compressed air. Once installed, this air dryer can dramatically reduce the number of contaminants that can cause damage to your brake system. Symptoms associated with a bad air dryer in need of replacement include leaking air, blocked purge valves, or poor performing condensers that are unable to receive built pressure. FleetPride is your First Click in Heavy Duty®.