Prepare your truck to be Ready for the Road Ahead® with the WABCO SS1200UP Coalescing Air Dryer that efficiently removes moisture from compressed air to ensure optimal brake performance. With the help of an internal desiccant, this air dryer filters moisture from compressed air before it can reach your wet and supply tanks. Once installed, the device can greatly reduce the wear and tear from contaminants that make their way into your brake lines. Air dryers needing replacement often show signs such as leaking air, blocked purge valves, or poorly performing condensers that can't receive built pressure. FleetPride is your First Click in Heavy Duty®.