Premium sump pumps are designed with the very best materials and latest technology. Based on the 50 series sump pump, considered one of America's most popular sump pumps, this product offers advanced switch technology allowing longer switch life. This model is constructed of the same heat-dissipating cast iron with epoxy powder coated finish, providing maximum pumping performance under the most extreme conditions. With Zoeller® cool run design, the hermetically-sealed, oil-filled motor and non-clogging vortex impeller add up to a long-lasting, trouble-free product. The heavy-duty power cord also includes an LED lighted plug.