The OTR Purge Valve Rebuilt Kit, with Expertise Built In , is specially designed for use with the SS1200 series air dryers in heavy duty trucks and trailers. It ensures a perfect fit and optimal functionality. This OTR purge valve rebuild kit helps to improve the performance of the air dryer system by reducing the risk of moisture buildup. Ensure your vehicle operates at peak efficiency with OTR Purge Valve Rebuild Kit. OTR understands what it takes to repair and maintain Class 6-8 trucks, so they deliver solutions, making your job easier and more efficient. OTR warranties are comparable to or better than OE and top brands. All heavy duty truck parts offer the same form, function, and fit as the OE replacement parts. FleetPride is your First Click in Heavy Duty .