Kitchen waste disposal units increase the load of organic carbon that reaches the water treatment plant, which in turn increases the consumption of oxygen.[28] Metcalf and Eddy quantified this impact as 0.04 pound of biochemical oxygen demand per person per day where disposers are used.[29] An Australian study that compared in-sink food processing to composting alternatives via a life cycle assessment found that while the in-sink disposer performed well with respect to climate change, acidification, and energy usage, it did contribute to eutrophication and toxicity potentials.[30]
Disposers range between $45 and $250, and most hold up fairly well under normal use. It's common for a $50, 1/3-hp disposer with a 1-year warranty to last 10 to 12 years. So what does more money buy? Increased longevity, longer warranties, more power and less aggravation. The better units have stainless steel components, auto-reversing starts and bigger motors. Units that reverse direction with each start greatly reduce stoppages, while larger motors can chew through larger and more varied food loads.
Our testers found that differentiating features you'll typically see at the store may not deliver the durability they imply. We also found that some models with fewer features and a shorter warranty cost more than relatively similar competitors. Home garbage disposers typically last about 10 to 12 years, according to InSinkErator, though not all reach the decade mark. A longer warranty does not guarantee longer life and can also make some models cost more than otherwise-similar machines. Here are the garbage disposer features to consider:
Some folks knocked the instructions. Take heart. It appears that the Waste King guys have heard the criticisms from the negative reviewers. I am guessing that they have been re-written to better explain the installation because they are really easy to follow. My best advice is this: don't be afraid of a difficult or confounding set of installation instructions. It is really easy. Here's what you do. Go to and search for a video on How To Remove Your Existing Garbage Disposal because this is the hardest part. You will find one that matches yours. Watch it. I started removing the Badger incorrectly, stopped, watched a video, and then it was a piece of cake. In my case, I shouldn't have removed the three long screws before removing the body of the old one. You do it after it is disconnected. READ the instruction manual carefully. Then go ahead and youtube the Waste King installation video. It is very easy once you see it done. No filing or grinding gaskets, and Good Lord, no car jacks under your sink please. If it is hard then you are doing something wrong. STOP!!! Review the procedure. Start again. The directions are actually very explicit. The parts are well labeled. The diagrams show you what to do. The videos show you what to do. If you prepare yourself (15 minutes of reading and watching videos, tops) you will fly though the installation and be a happy person.

Garbage Disposal Repair