Reverse rotation due to pump failure

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First, let me explain the reasons behind this inversion phenomenon. When several water pumps operate in parallel or a single pump is running, if the pump suddenly stops rotating and the check valve at the pump’s outlet is not tight, reverse rotation of the pump can easily occur. In such a situation, the pump must not be started, as this can easily cause damage to the shaft and the motor. Therefore, when this happens, it is necessary to immediately close the outlet valve of the pump and start the backup pump – this point must be kept in mind. What will be introduced below are the hazards caused by reversing the water pump. When a water pump operates in reverse, the pressure in its outlet manifold may drop sharply. Additionally, this can cause the impeller to loosen, leading to friction between the moving and stationary parts within the pump, which can result in damage to those components, affect the overall operation of the pump, and even pose safety hazards. In addition, when the water pump reverses direction, its head pressure will be very low; in severe cases, no water will be delivered at all.