"This Wayne Auto Utility Pump bottom suction pump utilizes iSwitch sensing technology to turn pump on when the water level reaches 1 1/4in. and pumps the water down to a 3/8in. level. Use to drain flooded basements, boats, sinks, stock tanks, flat roofs, window wells and more. Dimensions L x W x H in. 7 x 7 x 12, Discharge Port in. 1 1/4, Volute Thermoplastic, Amps 2.5, Volts 115, Thermal Overload Protection Yes, Impeller Shaft 1/4 in. steel, Power Cord ft. 7, HP 1/4, Self-Priming Yes, Flow GPH 3,000, Pump Housing Thermoplastic, Max. Total Head ft. 18. Powered by an energy efficient, oil-free motor. Corrosion-resistant housing 1 1/4in. discharge opening with 3/4in. garden hose adapter"