Drain Pump with Stable Performance? This item is constructed of hi-impact corrosion resistant plactic, 3/4HP sump pump moves up to 3000 gallons per hour tackles any draining job at a fraction of the time. Automatic Float Switch? Start/stop automatically. When water level is below 4/5 inch, it will automatically disconnect the power; when water level rises above 5 inch, the pump will start again. Manual Water Pump? When the float switch is locked on the pump, the pump will work all the time and the power will not shut off automatically, cut off immediately when the pump fails to pump water to prevent from dry running. Low Water Level Suction Pump? When it’s in manual mode, the lowest pump starting level is 2/5 inch; the lowest water sucking level is 1/25 inch. When it’s in auto mode, the lowest pump starting level is 5 inch; the lowest water sucking level is 4/5 inch. This sump pump with a suction screen at the bottom can whisk away water to 1/25 inch from the floor and allows to pass 1/5 inch grains. Easy to Connect Hose? 3 different diameters outlets NPT 1-1/2 inch, GHT 3/4 inch, Dia. 1-1/2 inch to adapter for different size hoses as needed according to the flow rate. The bigger the flow is, the wider the outlet should be. This item is not suitable for dirty water and working with expandable hoses. Application Occasions? Ideal for removing clean water from any enclosing environment, such as cellars, reservoirs, rain barrel, flat roofs and more, but not for applications involving corrosive or flammable liquids.