What size is the operating nut on gate valves 4 to 12 inches?

The operating nut on gate valves typically measures 2 inches square for valves ranging from 4 to 12 inches in diameter. This standard size is designed to provide sufficient leverage for operation while maintaining compatibility with commonly used tools, such as wrenches or sockets. A 2-inch square nut allows operators to efficiently open and close the valve, ensuring reliable control over water flow in the system.

As for other sizes listed, while they may exist for specific applications or specialized equipment, the 2-inch square nut is the designated standard for most gate valves within the specified range. This standardization helps ensure uniformity across waterworks infrastructure, thereby facilitating maintenance and operation by providing a widely accepted interface for utility workers.