A method and system for securing the exposed valve stem of the hydrant valve system in order to conserve valuable reserve resources and maintain street water pressure by restricting the unauthorized use therefrom; including a first device keying the exposed valve stem, a second devise containing the exposed portion of the keyed valve stem, a third devise for maintaining ease of rotation, a fourth device for securing the second device to the existing valve system, and a fifth device for engaging and operating the first device. The method and system for modification of the existing valve system to flush or recess the keyed valve stem including the steps of; modifying the design for manufacturing of the keyed valve stem, keyed valve stem wrench, and hydrant or valve containment body; or adding a tamperproof closure module; a keyed valve stem extension; a bearing system of specific clearance between the closure module and the valve stem extension, and operating the keyed valve stem or valve stem extension by means of a keyed wrench.