Sahara 500 Automatic Bilge now MK2 Automatic Bilge Pump, 500 GPH Patented X-Air Impeller: Prevents air locking so that the pump will not run dry and burn out Flexible Outlets: 90° rotatable elbow outlet allows users to install the pump anywhere in a full 360° orientation Single-Hand Pump Cartridge Release: Convenient when trying to access a pump located in a hard-to-reach area of the boat's hull Exterior Mounting Feet: Eliminates the need to remove the basket, saving OEMs time on production lines Universal Backwards Compatible Design: 7-pump mounting hole pattern for replacing any top bilge pump in its category SteadySwitch: Buoyancy control reduces cycling, draining the bilge not the battery No Pipe Or Hose Removal Required: Reduces the time that it takes to replace the cartridge Improved Motor Cooling/Heat Dissipation : Prevents overheating that may cause failures, such as blown fuse, leaking, etc Universal mounting pattern makes replacement simple photo may vary this unit will not fit in old base nor in a shower pan