Prepare your truck to be Ready for the Road Ahead® with the Bendix AD-IS® Air Dryer that efficiently removes moisture from compressed air to ensure optimal brake performance. This replacement part effectively removes liquids and water vapors from compressed air to prevent contaminants from entering your wet and supply tanks. Designed with safety valves that open at 153 PSI. To check if your air dryer needs replacing, check for symptoms such as blocked purge valves, leaking air, or poor-performing condensers that can't receive built pressure. FleetPride is your First Click in Heavy Duty®.