Ensure you're Ready for the Road Ahead® with the WABCO SS1800P Air Dryer, an air dyer designed to keep compressed air clean and dry for optimal brake performance. This air dryer effectively removes moisture from compressed air through an internal desiccant to prevent system damage and ensure optimal performance. To affirm your air dryer needs replacing, check for symptoms such as leaking air, blocked purge valves, or poor-performing condensers that are unable to receive built pressure. Compatible with models from major brands such as Kenworth, Mack, Meritor, Peterbilt, and Volvo. FleetPride is your First Click in Heavy Duty®.