The Wayne 1/2 HP (horsepower) 420 GPH (gallons per hour) shallow well jet pump is designed for wells up to 25' deep with jet pumps housed in rugged cast iron housing. The pump can run at 115V or 230V with the quick change voltage selection switch. The pressure switch is set to 30 psi (pounds per square inch) On and 50 psi Off for high-pressure delivery. 3/4" NPT (National Pipe Thread) discharge with 1-1/4" suction. Dual voltage 120V/240V) high efficiency square flange motor (factory set for 240V). Pressure switch is pre-set at 30-50 psi for automatic operation. Durable cast iron volute with dedicated priming port for volute filling. For wells 0' - 25' in depth. 1/2 HP; max. flow rate is 420 GPH; 50 psi). When processing claims please refer to www.mydoitbest.com plumbing home page for instructions. Pump serial number is required to process claim.