Little Giant Pumps duplex sewage pumps are pre-assembled duplex systems used for sewage, effluent, drainage and seepage applications. Each package includes sump pumps, control panel, basin & basin cover, control floats and check valves. The basin and basin cover are made from high-density polyethylene structural foam to protect from pumps when submerged in a sump. They feature access opening for sump pipes connecting to pumps and durable steel gasket cover around the opening to provide a tight connection. The capacitor-start pumps operate in an alternate cycle to prevent delay or interruption in pumping strokes. They are equipped with a 20 ft long cord for use in deeper tanks & sumps, and 3 sensor floats for high-water detection & pump On / Off. Choose from a wide range of Little Giant duplex sewage packages, available in 115 and 230VAC voltage ratings.