The Wayne 1/3 HP Submersible Sump Pump features a replaceable piggy-back tether float switch, an oil-filled, thermally protected motor to help prevent overheating and sturdy cast-iron construction. This pump's maximum discharge flow at 0 ft. of lift is 3,800 GPH. Its top suction screen filters debris while its 1-1/2 in. NPT discharge can handle high-capacity outflow.