Another vapour withdrawal method uses which feature on the withdrawal valve?

Another vapour withdrawal method uses which feature on the withdrawal valve?

• A. A male thread on the withdrawal valve
• B. Hoses rated at 100 psig
• C. A POL thread
• D. A standard water pipe fitting

Answer: (A)

When withdrawing vapor, the connection between the cylinder valve and the withdrawal hose must be secure and designed for a vapor-dedicated path. A male threaded outlet on the withdrawal valve provides the proper mechanical interface to accept the matching hose/fittings, creating a tight, leak‑tight connection for vapor withdrawal. The other options don’t define the valve interface needed for the vapor withdrawal method: hose rating is a generic safety spec, a POL thread is a different standard for attaching regulators, and a standard water pipe fitting isn’t relevant to gas vapor connections.

When withdrawing vapor, the connection between the cylinder valve and the withdrawal hose must be secure and designed for a vapor-dedicated path. A male threaded outlet on the withdrawal valve provides the proper mechanical interface to accept the matching hose/fittings, creating a tight, leak‑tight connection for vapor withdrawal. The other options don’t define the valve interface needed for the vapor withdrawal method: hose rating is a generic safety spec, a POL thread is a different standard for attaching regulators, and a standard water pipe fitting isn’t relevant to gas vapor connections.