Rule 3700Automatic 12vHeavy duty construction for both commercial and pleasure boat use; known for trouble free operation and reliability. 1-1/2″ (38mm) discharge outlet.WARNING: This product can expose you to chemicals including FORMALDEHYDE (GAS) which is known to the State of California to cause cancer. For more information go to P65Warnings.ca.gov. Specifications:Gallons Per Hour: 3700 GPHOperation: AutomaticOutlet Size: 1-1/2″Volts: 12vType: ElectricBox Dimensions: 7″H x 8″W x 11″L WT: 7.5 lbsUPC: 042237083050Owner’s Manual (pdf)