Product Details: The WABCO System Saver® SS1200 Air Dryer ensures you're Ready for the Road Ahead® with clean and dry compressed air for a responsive brake system. To prevent contaminants from entering your wet and supply tanks, this device utilizes a filtering desiccant element that removes moisture from the compressed air. This replacement part is compatible with several components from brands such as Mack, Meritor, and Volvo. Symptoms of an air dryer in need of replacement are leaking air, blocked purge valves, or poor-performing condensers that can't receive built pressure. FleetPride is your First Click in Heavy Duty®.