This insinkerator replaced one that was installed in the 1970's! We are the 4th owners of house and when the old one developed problem was not repairable. Thus far it is working great but doubt it will last as long as the other. Water gets really hot so had to turn the temp down to prevent anyone getting burned. Removing old one and installing new cost several dollars more than the Insinkerator since we do not have a plumber in the family!