This specification covers cold water displacement meters in sizes 5/8", 5/8x3/4", 3/4x3/4", 1", 1-1/2” and 2” and the materials and workmanship employed in their fabrication. It also covers cold water turbo meters in sizes 1-1/2”, 2”, 3”, 4”, 6”, 8”, 10”, 12”, 16” and 20” and the materials and workmanship employed in their fabrication. The displacement meters must be of the type known as either nutating disc meters, which are positive in action in that the discs displace or carry over a fixed quantity of water for each nutation of the disc when operated under positive pressure or ultrasonic meters which have a basis for measurement using ultrasonic signals sent consecutively in forward and reverse directions of flow. Meters shall conform to latest revision of AWWA C700/C710.