Aquastrong 1HP Sewage Grinder Pump, Stainless Steel, 115V Automatic Float Switch, Submersible Effluent/Sump Pump for Sump Basin, Basement Residential Sewage, 2'' NPT Discharge Efficient Grinding Capability: This heavy duty grinder pump with stainless steel cutting blade can easily shred tough solids in sewage to prevent blockages, such as clothing, wipes, hair and other debris. It is a cost-effective solution for managing wastewater in basement and sump basin with minimal maintenance. DO NOT use in gasoline, alcohol, or biogas-filled septic tanks. Powerful Durable: Quality stainless steel motor housing for high corrosion and abrasion resistance. Efficient 1HP copper wired motor offers high performance of Max. flow 3962GPH/Max. head 46ft. Rugged cast iron base with anti-clog impeller ensures a long service life in tough sump pump applications. Exhaust valve prevents air lock effectively for smooth flow Auto Operation: Adjustable tether float switch allows the pump to auto turn on/off by water level in sump basin/pit. Portable handle with special cable lock design for simple transportation and adjustment. Please shorten the length of the float switch appropriately by cable lock to fit your sewage needs and prevent the pump from freezing in clod winter