Which type of valve is typically used to shut off the gas main from the service?

The appropriate choice for shutting off the gas main from the service is the slotted plug core shut-off valve. This type of valve is designed specifically for gas service applications and provides reliable functionality in terms of complete closure when necessary.

Its design allows for a smooth opening and closing action, making it ideal for controlling gas flow efficiently. Furthermore, it can handle different pressure levels associated with gas systems, ensuring safety and effectiveness. The slotted feature permits visibility of the valve position, allowing quick identification of whether the valve is open or closed.

Other types of valves have their specific applications and functions. For instance, ball valves are excellent for quick shut-offs because of their quarter-turn operation, but they may not be the established standard for gas main shut-off in every jurisdiction. Gate valves, while commonly used in plumbing, are typically less effective for gas service since they can be slower to operate and may not provide a completely leak-proof closure. Check valves, on the other hand, are designed to prevent backflow and are not intended for shut-off purposes. Understanding these distinctions is crucial for selecting the correct valve for different applications.