820-0004 - 820 Shark Series Cast Iron 2 HP Grinder Pump - 115V - 230VZoeller 820 0004 820 Shark Series Cast Iron Grinder Pump 115V 230V The Zoeller 820 0004 Shark Series Grinder Pump is a heavy duty, commercial grade solution designed to handle demanding sewage and wastewater applications. Built with a rugged cast iron body and powered by a high performance 2 HP motor, this grinder pump is engineered to reduce solids into a fine slurry for reliable transfer through low pressure sewer systems and long discharge runs.