Sump Pump 3500 Gph 1hp Submersible Clean/dirty Water Pump With Buildin Float Swi. ?? Kindly Tip 1? When you start use the pump you must be submerged into the water at a slight angle to allowthe remaining air to escape. This type of use will substantially shorten the pump’s life expectancy. ?? Multi Outlet Sizes? 3 different diameters outlets (1 inch, 1-1/4 inch, 1-1/2 inch) to adapte for different size hoses as needed according to the flow rate. The bigger the flow is, the wider the outlet should be. ?? Manual Mode? Set the switch to the MANUAL positon the pump will now not automatically switch off but carry out pumping, even if theremaining water level is reached and the pump runs dry. You should cut off the power immediately to prevent the coil from getting burned. ?? Automated Mode? Set the switch to the AUTO position. Once you have plugged the device into the socket, the pump will switch on automatically when the water exceeds the start-level and switch off when the stop-level hasbeen obtained. This means that the pump can be left on at all times and will keep the waterin a cellar or boat, for example, at the required level. Bear in mind that this pump is notdesigned to be used continuously, it must be switched off at regular intervals. ?? Sealing Structure & Durable Construction? The sump pump features a durable sealing structure and the durable thermoplastic body keeps the pump from corrosion. The higher base plate which assures the prevention of debris collection in the sump pit. Unable to choose a carrier. Any product you return must be in the same condition you received it and in the original packaging. Please be aware that our products are stored and fulfilled by third-party warehouses and manufacturers across the United States (also known as third-party fulfillment or product sourcing). We usually respond within 24 hours on weekdays. Thank you for shopping at our store.