The Evolution Septic Assist® garbage disposal is specifically designed for homes with septic systems. The Bio-Charge® injection technology automatically injects more than 300 million enzyme-producing micro-organisms into the InSinkErator Septic Assist each time it's operated. Delivering quiet performance SoundSeal technology allows you to hold a conversation in the same room while the garbage disposer is working MultiGrind technology provides 2 stages of grind rather than 1 stage like standard disposers, to effectively grind difficult food items like bones and Apple cores 3/4 HP heavy-duty Dura-Drive® induction motor quietly delivers reliable performance year after year; 1725 RPM motor pulverizes difficult food waste like chicken bones and Apple cores Bio-Charge® injection technology utilizes a natural microorganism to help break down food waste in the septic system and deodorizes to help control sink and drain odors Large, 40 OZ. capacity grind chamber allows you to dispose of more food waste right into the sink, keeping the food preparation area clean and reducing bagged garbage Patented Quick Lock mounting system allows for easy installation and replacement of kitchen garbage disposals; the Quick Lock mount is completely compatible with all InSinkErator models — simply twist off the old one and twist on the new Stainless steel grind chamber and components provide superior durability and protect against corrosion to withstand long-term wear Garbage disposal is specifically designed for homes with septic systems The InSinkErator Septic Assist garbage disposal is assembled in the USA and carries a We Come To You® 4-year in-home limited warranty that covers parts and labor for added peace of mind