When pumping from a tank and intermittently using attack lines, how can the pump operator prevent the pump from overheating?

The correct choice is to set the circulator valve to tank position. This action helps to maintain an adequate flow of water through the pump even when attack lines are being used intermittently. When the circulator valve is set to tank position, it allows water to be recirculated from the tank back into the pump. This helps keep the water within the pump moving, which is essential for dissipating heat and preventing overheating. Continuous movement of water aids in cooling the pump components, maintaining optimal functioning.

In contrast, increasing the pressure could lead to more strain on the pump and does not directly address the issue of overheating. Flowing water continuously might seem beneficial, but if the attack lines are not in constant use, there may not be an adequate flow to cool the pump effectively. Reducing the pump speed could also exacerbate the problem, as slower speeds may not provide sufficient water movement to help control the temperature within the pump.