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 GPH Operation: Automatic Outlet Size: 1-1/2" Volts: 12v Type: Electric Box Dimensions: 7"H x 8"W x 12"L WT: 7.5 lbs UPC: 042237083050 Owner&';s Manual (pdf).embed-container { position: relative; padding-bottom: 56.25%; height: 0; overflow: hidden; max-width: 100%; } .embed-container iframe, .embed-container object, .embed-container embed { position: absolute; top: 0; left: 0; width: 100%; height: 100%; }