3700 G.P.H. Gold Series Bilge Pump Rule 3700Heavy duty construction for both commercial and pleasure boat use known for trouble free operation and reliability. 1 12 38mm discharge outlet. 12 Volts DC unless noted.FeaturesFully SubmersibleEasy clean snap lock strainerSilent and vibrationless operationAnti airlock protectionCompact, efficient long life motorIgnition protectedNo burn out when run dryRust and Corrosion protectionUsed by leading boatbuilders worldwidemarine grade blocked wiring