Why are pressure tanks used in water systems?

Pressure tanks play a crucial role in water systems by helping to maintain consistent water pressure and providing storage capacity. When water is pumped into the pressure tank, it compresses air within it. This compression creates pressure that allows water to be dispensed from the tank without the need for the pump to operate constantly. As a result, the pressure tank ensures that there is a steady flow of water available, reducing fluctuations in pressure during peak usage times.

The storage capacity aspect of pressure tanks is also significant. They store a specific volume of water that can be accessed immediately when needed, which can be especially important in systems with varying demand. This dual function enhances the efficiency of the water supply system, as it minimizes the operational frequency of the pump, leading to energy savings and extended pump life.

This function is distinct and critical compared to the other options, which do not address the primary purposes of pressure tanks in water systems. While reducing noise and filtering impurities may be desired in certain systems, those are not the fundamental roles that pressure tanks serve.