How to replace the stopper assembly on a garbage disposal
Steven E / Wednesday March 19, 2025
Is your batch feed garbage disposal acting up when you try to use the stopper? If it’s not working properly, a worn-out stopper assembly might be the culprit. Luckily, replacing it is a straightforward fix. Let’s walk you through everything you need so you can get your disposal back on track without calling in a pricey pro.
The information in this article may not apply to your specific appliance model. For the most accurate guidance, it’s best to check your manufacturer’s documentation or reach out to us if you’ve got any questions.
What is a batch feed garbage disposal?
Batch feed garbage disposals use a stopper to turn on the grinding mechanism. Unlike continuous feed models that use a wall switch, batch feed disposals activate when you insert and twist the stopper. If the stopper’s worn or broken, the disposal might not turn on at all, or it could run erratically, causing all sorts of kitchen headaches. Knowing how to swap out a faulty stopper can save you time, money, and a lot of frustration.
What you’ll need
Before you start, gather up the following tools and parts. It makes the whole job easier when everything’s at your fingertips:
- A replacement stopper assembly that fits your disposal model
- Screwdrivers (flathead and Phillips)
- An adjustable wrench for tight spots
- A flashlight to see inside the disposal
- Work gloves to protect your hands from sharp edges
Not sure what model you’ve got? No worries—check out our guide on how to find your appliance’s model number. It’ll help you track down the right part so you won’t hit any snags.
Safety first!
We care about your safety, so keep these precautions in mind before you get started:
- Turn off the disposal: Make sure it’s switched off.
- Disconnect the power: Unplug the unit or turn off the breaker to avoid any shocks.
- Wear gloves: Work gloves will protect your hands from sharp edges inside the disposal.
Replacing the stopper assembly
Remove the old stopper
- Find the stopper in your sink’s drain opening.
- Grab it and pull it up. Some stoppers may need a twist or wiggle if they’re stuck in there tightly.
- Look over the stopper for any damage—cracks, chips, or other signs of wear that might’ve been causing the issue.
Check inside the disposal
- Shine a flashlight down into the disposal so you can see clearly.
- Look for debris or anything stuck that might prevent the new stopper from working right. Even small items like plastic bits or food scraps can cause trouble.
- Carefully remove any objects using pliers if necessary—try not to put your hands in directly.
Put in the new stopper assembly
- Line up the new stopper with the opening, making sure it fits into the grooves of your specific model.
- Push the stopper down firmly so it sits snugly—no gaps allowed. This is crucial for getting the batch feed mechanism to kick in properly.
- Test it out by twisting the stopper to the “on” position to check if it engages the disposal as it should.
Power up the disposal
- Plug the disposal back in or flip the circuit breaker back on.
- Leave the disposal off for now until you’re ready for testing—this keeps any accidental starts from happening.
Test your repair
Now it’s time to see if your handy work paid off:
- Run some water into the sink. This helps check that the seal is holding properly.
- Insert and turn the stopper to activate the disposal. You should feel a solid click as it locks in.
- Listen for smooth running—if you hear any strange grinding or rattling, it could mean the stopper isn’t seated right or there’s still something in there that shouldn’t be.
- Turn it off by taking the stopper out or twisting it as your manual directs. Make sure it stops promptly.
Wrapping up
If you’re still having trouble, head over to our website for more repair help. We’ve got tons of detailed guides that can help get you sorted.
For parts, resources, and more DIY support, visit AppliancePartsPros.com. We’re here to back you up at every stage of your repair journey.
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With nearly a decade of experience in providing top-notch customer service regarding appliance parts and repair, Steven enjoys sharing practical advice, troubleshooting tips, and interesting information to help readers stay informed.