53-0001 - M53 Series Automatic Cast Iron Sump Pump, 115V, 1/3 HPM53 Series Sump Pumps Float operated, submersible, 2 pole mechanical switch and variable level, long cycle systems available Corrosion resistant, powder coated epoxy finish No sheet metal parts to rust or corrode Stainless steel screws, switch arm, guard, and handle No screens to clog Watertight, neoprene square ring between motor and pump housing Solid, buoyant, polypropylene float Oil filled, hermetically sealed, automatic reset thermal overload