Why does the booster pump keep making noise when there is no water flow?

[JadeFitz]

The reasons why the booster pump keeps making noise when there is no water flow are as follows: Issues with the pressure control system: When the working pressure reaches the controlled pressure, the water pump stops working. This indicates a problem with the pressure control system. Once the pump stops, the pressure will drop. No water in the outlet direction: Since there is no water usage in the outlet direction, the pressure quickly replenishes, causing the booster pump to immediately enter standby mode. This repeated cycle results in the phenomenon of intermittent noise and stopping. Leakage in the pump outlet pipe: Due to the drop in water pressure in the pump chamber, the water pump restarts to replenish pressure, resulting in very little water flow in the outlet direction. This causes the pressure to quickly rise to the set value, prompting the booster pump to stop and maintain pressure. Once the pressure is reached, leakage causes the water pressure to drop again, and the booster pump restarts to replenish pressure. This repeated cycle leads to the phenomenon of intermittent noise and stopping.