Where is test cock #2 located in the RP assembly?

In a Reduced Pressure Principle (RP) assembly, the purpose of test cock #2 is to facilitate the testing of the check valve located upstream of it. The correct position for test cock #2 is indeed between the inlet valve and check valve #1. This placement allows for the pressure while testing to be monitored effectively at the first check valve, which is critical for assessing its functionality.

Testing the RP assembly involves checking the relief valve and both check valves, and the arrangement of the test cocks is designed to provide a comprehensive understanding of each component's operation under pressure. By having test cock #2 positioned as it is, technicians can ensure proper function of the inlet check valve, confirming that it is sealing correctly and preventing backflow.

The roles of the other components in the assembly clarify why their respective arrangements are essential for backflow prevention, but do not change the critical nature of the test cock's location in relation to the check valves for effective testing procedures.