Sahara S1100 Bilge Pump - --S1100 is our most powerful and efficient automatic pump High capacity for larger boats and yachts. 1100 GPH at open flow, 973 GPH at 3.3" head. 1-1/8" hose outlet. Rated Voltage of 12-Volts. With a 36" wire connector.F E A T U R E S-Listed GPH is measure at Design Voltage of 13.6 VDC.