Cartridge-style pump head. Pump body accepts both ?" and 1-1/8" screw-on outlets to allow ease of installation. Use the 3/4" outlet for 800 GPH or the 1-1/8" outlet for 1100 GPH flow rates. Ignition protection and low power draw. Runs dry without damage. Meets ABYC, Coast Guard and ISO marine standards. GPH 800 or 1100 Ports 3/4" or 1-1/8" Volts 12