When a vapor service valve (POL) is disconnected, it should be equipped with what?

When a vapor service valve (POL) is disconnected, it should be equipped with a plug or cap to ensure safety and prevent any potential hazards. The primary purpose of a plug or cap is to seal the open port of the valve. This helps to contain any residual gas within the cylinder and to prevent the entry of debris, moisture, or contaminants that could compromise the integrity of the system.

Using a plug or cap is crucial because it minimizes the risk of gas leaks, which can pose serious safety threats, including fire hazards or asphyxiation due to inhaling propane or other gases. Additionally, sealing the valve properly when it is not in use ensures compliance with safety regulations and best practices in handling LP gas systems.

While a pressure gauge, safety chain, and emergency release valve are important components in various contexts of LP gas systems, they do not serve the specific function of sealing an open vapor service valve when it is disconnected. A pressure gauge measures the gas pressure but does not prevent leaks. A safety chain is used to secure cylinders and keep them safe from tipping over, but it does not seal the valve. An emergency release valve is meant to vent excess pressure in case of an overpressure situation, but it is not relevant when the valve is