This 12V Purge Valve is a reliable replacement for the Bendix AD-9. Designed to fit most makes and models, this product offers practicality and convenience. With its easy installation and durable construction, it ensures optimal performance and functionality. Sold individually, this purge valve is a cost-effective solution for maintaining the efficiency of your vehicle's air brake system. Trustworthy and efficient, this replacement part is a must-have for any vehicle owner looking to enhance their braking system's reliability.