Rule RM1100B 1100GPH 12v Bilge PumpProduct Features Higher Flow optimized impeller to provide up to 10% more flow at the same amperage as previous models with capacities from 500 2000 GPH (1893 7571 LPH) Auto Sense Intelligence integral water level sensor controls the pump automatically Back Up Feature prevents continuous running if sensor is fouled by debris, pump reverts to 2. 5 minute cycle mode Smaller Footprint 2 3 the size of previous models (500 1100 GPH models only) Built In