Rhode Island Journeyman Plumber Practice Exam

What is the maximum setting of a temperature pressure and relief valve?

1. 120 psi

2. 140 psi

3. 160 psi

4. 180 psi

The correct answer is: 160 psi

The maximum setting of a temperature pressure and relief valve is typically established to ensure safety within plumbing and heating systems. In most instances, the standard maximum setting allowed for temperature pressure relief valves in residential applications is 150 psi. However, it is essential to consider that valves with maximum settings of up to 160 psi are commonly used in various settings. Choosing 160 psi aligns with industry standards, allowing for safe operation under high-pressure situations while providing necessary relief to prevent equipment damage from excessive pressure buildup. Properly setting the temperature pressure and relief valve is crucial for the protection of both the system components and the safety of individuals using hot water systems. The other options, such as 120 psi, 140 psi, and 180 psi, do not represent the commonly recognized maximum for temperature pressure relief valves. While 120 psi and 140 psi may serve as lower settings, 180 psi exceeds the typical safe operational threshold, making it potentially unsafe for standard applications.