The 30/50 well system pressure switch from Water Source will signal your pump to start when the water system's pressure drops to 30 PSI, and it shuts off once it reaches 50 PSI. It's designed to be used with submersible well or jet pumps, and it must be used in conjunction with a well pressure tank. It can be wired to 115-volt or 230-volt systems. | Water Source 30/50 Well System Pressure Switch