What does a pressure switch control in a well system?

A pressure switch in a well system is crucial for maintaining the desired water pressure within the system. It monitors the pressure of the water in the pressure tank and activates the pump when the pressure drops below a predetermined level. This ensures that there is a continuous and adequate supply of water to meet demands, such as turning on faucets or appliances.

When the water is used and the pressure in the tank falls, the pressure switch signals the pump to start, drawing water from the well to refill the tank and restore the pressure. Once the pressure reaches the set upper limit, the pressure switch turns off the pump to prevent over-pressurization. This automatic control is vital for the efficient operation of a well system, allowing it to respond to water usage without manual intervention.

The other options do not directly relate to the function of a pressure switch. Water filtration rates are managed through separate filtration systems; water temperature is typically controlled by heaters or thermoregulators; and piping alignment pertains to the physical layout of the plumbing system rather than the operational controls of pump activation.