The Haldex 64" Air Brake Reservoir Drain Valve is a reliable and easy-to-use valve designed to help prevent damage to pipes and tanks caused by excess water. This drain valve is easy to install and operate, and comes with a simple handle or lever that can be turned to open or close the valve. The valve functions when pressure varies in an air tank or reservoir, and is designed to be durable and long-lasting. FleetPride is your First Click in Heavy Duty®.