Where should pressure gauges be connected on a pump's suction and discharge sides?

The pressure gauges should be connected at the pressure taps supplied on the pump because these taps are specifically designed for this purpose. They provide accurate measurements of pressure directly at the pump's suction and discharge points, which is crucial for monitoring the pump's performance and ensuring it operates within designated pressure ranges. Accurate pressure readings help operators assess the efficiency of the pump, identify potential problems such as cavitation or blockages, and ensure that the system is properly balanced.

Other options suggest locations that may not give accurate or reliable readings. For example, placing gauges at the highest point of the pump might not reflect the actual pressure at the pump's discharge because of potential losses due to elevation. Similarly, positioning the gauge at the lowest point of the suction line could lead to readings influenced by static head rather than actual operating conditions. Lastly, connecting a gauge at the water source entrance would not provide insight into how the water is handled by the pump itself, which is crucial for effective management and troubleshooting.