Little Giant APCP-1700 (577301) is a 115-Volt Automatic Pool Cover Pump with a low energy consumption, permanent-split capacitor (PSC) 1/3HP motor. It has Screened Intake, 1 in. FNPT Discharge, Glass-filled polypropylene Housing and 25 in. power cord. The APCP-1700 model activates in approximately 2 in. of water and deactivates in approximately 1.5 in. of water. The APCP-1700 has a wide base design for needed stability. Intermittent Liquid Temperature is up to 120 degree F. Little Giant APCP-1700 is ideal for removing water from all types of pool covers. The 1700 GPH performance was obtained through a 1 in. I.D. tube, with friction losses neglected. Using a 3/4 in. garden hose 50 foot long reduces this performance to approximately 500 gallons per hour due to friction losses in the hose. If your area frequently has heavy rain falls, (1 in. - 2 in. per hour), it may be necessary to use 1 in. tubing. This should be available in most pool supply stores.