A water pressure switch is a device that is used to control the flow of water in a plumbing system. It does this by opening and closing a valve in response to changes in water pressure. Water pressure switches are typically used in conjunction with a pump to maintain a consistent water pressure throughout a system. They can also be used to protect pumps from damage by preventing them from running when there is no water pressure.
There are two main types of water pressure switches: mechanical and electronic. Mechanical water pressure switches use a diaphragm or piston to sense changes in water pressure. Electronic water pressure switches use a pressure transducer to convert water pressure into an electrical signal. Both types of switches have their own advantages and disadvantages. Mechanical water pressure switches are typically less expensive than electronic switches, but they are also less accurate and can be more difficult to adjust. Electronic water pressure switches are more accurate and easier to adjust, but they are also more expensive than mechanical switches.