Designed to use in cistern pump applactions the ATER 20 Series provides gallons per minute (GPM). All pumps are powered by a high-quality 0.5 hp submersible motor - 115 VAC. 1.25-inch NPT pump outlet. providing 20 gpm at 110 ft of head or 48 psi at 20 gpm 10gpm at 150ft of head or 65 psi with a maximum 170 ft of head at 1gpm. The bottom suction design allows for the unit to pump longer giving you further draw-down capability and more reliably without losing prime. Motor protected thermally by a built-in thermal overload. Because the design of the unit and its hollow jacket allows pumped water to cool the motor it does not require a flow induction sleeve to operate. Built for long life in gray water and effluent pumping applications. Stainless steel and precision molded industry-standard thermal plastic construction for all wetted surfaces. 10' SJOOW power cord designed specifically for cistern pumping.