Who knows if this will last any longer than the four other tanks we've had over the last 16 years? I will say that inSinkerator seems to care. They have always either replaced tanks for free or given a 50% discount on a new one. Maybe it's all buile into the price, who knows, but even if it is, it's nice that someone cares that something isn't working anymore. Swapping out the tank was a non-event, contrary to lots of what's been written here. Four years per tank is probably pretty good. We couldn't do without this now, such a time-saver.