What features must a wet hose or pump discharge system have?

A wet hose or pump discharge system is designed to ensure accurate and reliable measurement of liquid transfer, which is crucial for various applications. The correct answer includes shut-off valves, anti-drain valves, and a calibration point, as these features collectively contribute to the system's functionality and accuracy.

Shut-off valves are essential for controlling the flow of liquid within the system. They allow operators to stop the flow of liquid when necessary, which is critical for preventing leaks and ensuring safety during operation. Anti-drain valves are significant as they prevent backflow and leakage when the system is not in use, which helps maintain the integrity of the system and prevents measurement inaccuracies caused by residual liquid.

Additionally, having a calibration point is vital for ensuring that the system can be measured and validated accurately. This allows operators to perform routine checks and adjustments to maintain measurement precision over time. Therefore, this combination of features ensures that the wet hose or pump discharge system operates safely and effectively, providing reliable measurement for various needs.