What is the function of a pressure tank in a water well system?

The function of a pressure tank in a water well system is to maintain consistent water pressure and reduce pump cycling. In a well system, water is drawn from underground sources via a pump. Without a pressure tank, the pump would need to turn on and off frequently each time water is used, leading to wear and tear on the pump and inefficiencies in operation.

The pressure tank serves as a reservoir that holds a certain amount of water under pressure. When water is needed in the household, the pressure tank releases water, which helps maintain a steady flow and pressure throughout the system. Once the water level in the tank drops to a certain level, the pump activates to refill the tank. This process minimizes the number of cycles the pump undergoes, enhancing its longevity and efficiency.

The other options do not accurately describe the primary role of a pressure tank. While filtering impurities is important in water systems, that task is typically served by a filtration system rather than a pressure tank. Heating water is the function of a water heater, and while pressure tanks can store water, their main purpose is to manage pressure rather than just store unused water.