Rule 12V 3700-Gph Auto.Bilge PumpRule 3700 GPH Automatic Bilge Pump 12V High capacity automatic bilge pump engineered for larger powerboats, sailboats, and cruisers requiring superior pumping performance and reliability in demanding marine environments. Key Features: 3700 gallons per hour high volume pumping capacity Automatic operation with integrated float switch 12V DC operation for standard marine electrical systems Heavy duty construction for continuous duty applications Large