• Oil filled for optimal heat dissipation: This design minimizes concerns about the pump overheating or breaking down due to extreme heat generation during extended-use applications
• Bronze vortex impeller to allow free passage of solids which prevents clogging and lessens downtime
• Durable, cast iron construction - switch case motor and pump housing, and base

The 1/2 HP Model BN137 nonautomatic Effluent Pump with a piggyback variable level float switch is designed to remove grey water from basement sump applications. This corrosion resistant pump will provide the dependability expected from a Zoeller pump. Backed by a 3-year warranty, every pump is submerged in water and tested to its published performance curve, ensuring it meets your expectations and delivers peace of mind right-out-of-the-box.