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. Universal strainer base is connection-compatible with Attwood Tsunami, Rule and Johnson/Mayfair cartridge pumps. Screw mounting holes match Rule and Attwood Tsunami pump bases. Ignition protection and low power draw. Runs dry without damage. Meets ABYC, Coast Guard and ISO marine standards. Description Submersible pump GPH 800 or 1100 Ports 3/4" or 1 1/8" Volts 12