What could indicate that you have forgotten to take an important step while filling a system?

When filling a system, the activation of the relief valve is a crucial indication that something may have gone awry. The relief valve's purpose is to ensure that pressure within the system does not exceed safe operational limits. If the valve becomes active, it suggests that excessive pressure is building up, which often happens when important steps—such as purging air, venting, or controlling the flow rate—have been overlooked during the filling process.

In a properly filled system, pressure should remain stable and within prescribed limits. If the relief valve opens, it signifies that there is an unexpected condition requiring immediate attention, indicating a potential oversight in the process. Recognizing this can help a steamfitter take corrective actions to avoid potential hazards or damage to the system.

Other indicators, such as a pressure gauge reading zero, leaking fill valves, or excessive system temperature, could point to separate issues or failures in the system but do not directly relate to the step of filling and the procedure’s integrity. The activation of the relief valve is specifically tied to the management of pressure during filling, making it a key indicator of any necessary corrective action.