Master Plumber Practice Exam

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Question: 1 / 400

The terminal end of the drain for a pressure-relief valve shall not be what?

A painted

B reamed

C threaded

The terminal end of the drain for a pressure-relief valve should not be threaded. This is because a threaded end can create a trap where debris can accumulate, potentially obstructing the free flow of any discharge from the valve. Additionally, a threaded end can also introduce the risk of leaks due to the joint, which compromises the effectiveness of the relief system. Maintaining an open, unobstructed drain path ensures that the pressure-relief valve functions as intended, providing a clear route for the safe release of excess pressure.

Other options, such as painted, reamed, or open, do not present the same risks regarding potential blockages or leaks at the drain terminal. In fact, keeping the drain open and clear is essential for the safety and proper operation of pressure-relief systems.

Master Plumber Practice Exam

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