Product Details: The Bendix AD-IS® Air Dryer ensures you're Ready for the Road Ahead® with clean and dry compressed air for a responsive brake system. This replacement part effectively removes liquids and water vapors from compressed air to prevent contaminants from entering your wet and supply tanks. Thanks to the internal desiccant element, airborne particles are redirected to your truck's wet tank, reducing wear and tear the vehicle's air brakes. Symptoms of 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®.