A Helpful InSinkErator Parts Overview by a Master Plumber

Before you rush out to buy parts for your InSinkErator garbage disposal, check out this Master Plumber's Quick Guide to save a lot of time and frustration...
The InSinkErator brand (ISE) is the world's largest manufacturer of food waste disposals; plumbers have used this brand almost exclusively since their inception. The quality design, manufacture and materials equate to an exceptional appliance (and plumbers hate "call-backs"). As such, InSinkErator parts aren't really a huge-demand product. As a former Master Plumbing Contractor in Florida, I can say that most "repairs" were actually due to misuse or "misinstallations" (there's a new word for you - similar to "misspeaking").


So which parts did I use the most? Here's the run-down, including a few timely tips.
The most used item was not an actual part at all, but rather an accessory included with every InSinkErator garbage disposal: their patented "Jamb-buster® Wrench." This handy little tool is actually a double-end, offset allen-key wrench which is used to unjam the disposal. This is easily accomplished by inserting it into the hex socket at the very bottom of the motor and then turning it back and forth until it moved freely again. (You would also need to press in the red reset button which is a safety overload device to protect the motor when jammed).

The disposal "jam" was by far the most common service call I ever made and was typically the result of an item being dropped down the sink drain (like a ring or a piece of silverware). Rather than using a broomstick, or completely dismantling the disposal, which is common with other disposal brands, I often felt a bit sheepish solving the problem in under a minute with the "ISE magic key!" Of course I always carried one in my toolbox since inevitable my customer had either lost theirs or were unaware they had even owned such a tool. If this is the same situation with you, I recommend digging around - plumbers often stick it right on the disposal in a little pouch that comes with it, or just inside of the sink cabinet. If you can't find it, get one and save a service call; they're readily available.

Other commonly used parts
The drain stopper was the next most popular replacement part. These were simply lost (or "misplaced") and are commonly available in chrome or plastic.
Third in the parts lineup was the rubber baffle which fits down inside the sink flange. They wear out after a few years of use and are an important component for two reasons:
1) First (as the name implies), they act as a sound baffle to promote a little quieter operation.
2) Second, they prevent the back-splashing of water during food grinding as well as when your dishwasher is discharging into your disposal drain (if plumbed accordingly).
Although the rubber baffle is part of the mounting gasket system, you shouldn't need to dismantle your disposal from the sink to replace it unless it's also the source of a leak under your sink. A much easier option is to buy an inexpensive replacement baffle that simply fits down into the sink flange. (Don't you wish all jobs where this easy?)
The fourth most popular part was the "disposal to dishwasher drain connecting kit." If your dishwasher is plumbed to drain into your disposal, this kit is used to make the connection. It's simply a stepped-down rubber boot with a couple of clamps to fit the drain hose to the disposal nipple. Actually, this kit isn't included with the disposal since not everyone has a dishwasher, or else the dishwasher may be plumbed into its own separate drain.

Two quick tips:
1) Be certain that your DW drain hose loops up high and is fastened under the counter top. This makes an air-loop that prevents waste water from your sink from backing up into your dishwasher - not good...
2) Cut off about 4" of 5/8" copper or CPVC tubing and insert it between the connecting kit and drain hose for a tighter, more leak-proof connection.
Finally we have the 1 ½" discharge tube. This is the drain elbow that connects your disposal drain outlet to the P-trap beneath the sink. It should come with a flanged rubber gasket (typically the cause of the leak) and a metal back-up washer.

Easy to fix and find.
These common repairs are easily performed by the average handyperson and parts are readily available. For more helpful information including identification charts, product data and more, I recommend visiting the site mentioned in the Bio Box below - simply some good guidance from an old pro.
Gary loves offering helpful solutions to his fellow do-it-yourselfers. Check out his latest website at InSinkErator Parts, where you'll discover helpful reviews and insights into a full range of ISE waste disposal models, parts, diagrams and more, including info on the Badger series, and the top-of-the-line Evolution series...