Myers ME4 Series Cast Iron Submersible Sump / Effluent Pumps are designed for home sumps. The unit is equipped with a 3-prong grounding-type power cord. The shaded-pole motor is oil filled and sealed for cooler running. Upper sleeve/lower ball bearing on the motor shaft never need lubrication. Automatic reset thermal protection. 1/2" Solids Handling spherical capability.