Rule 3700 15A Bilge pump, 1-1/2" outlet, 32 volt. 3700 gallons per hour. Features exclusive Rule moisture tight seals. Compact, efficient, maintenance-free positive snap lock strainer base. Totally submersible, silent running, vibration less, ignition protected, water-cooled motor. Anti-airlock features, no burnout when run dry. Stainless steel shaft.