Plumbing Picks is reader-supported. As an Amazon Associate, we earn from qualifying purchases at no extra cost to you.
Quick answer from a licensed plumber: InSinkErator disposers hang on InSinkErator’s three-screw Quick Lock mount. Waste King makes two different mounts: the plastic, twist-lock EZ Mount and the stainless Pro 3-Bolt Mount. A new disposer of the same brand and mount drops onto the old mount. A Waste King EZ Mount unit can go onto an existing InSinkErator mount with Waste King’s 3101AMC adapter. Everything else means changing the mount and the sink flange.
Replacing an InSinkErator with an InSinkErator? The new one twists onto your existing mount. See the InSinkErator Badger 5 on Amazon
The Three Mounts at a Glance
InSinkErator uses one mount across its disposers. Waste King sells two, and they are different parts. Everything in this table comes from the makers’ own pages:
| InSinkErator Quick Lock | Waste King EZ Mount | Waste King Pro 3-Bolt Mount | |
|---|---|---|---|
| How it holds | Three mounting screws and a snap ring hold the mount to the sink flange; three tabs on the disposer’s lower mounting ring turn onto three ramps on the mount | “twist-and-lock design” | “Durable, all-metal mounting system” |
| Mount material | Stainless sink flange (the QLM-00 mount is “Polished Stainless Steel”) | “durable plastic” | “stainless steel” |
| Splash guard | Evolution: a removable Quiet Collar baffle that snaps in. Badger: a sink baffle that a Badger baffle upgrade kit (BUK-00) makes removable, per that kit’s listing | Removable | Built in, not removable |
| Drain opening (Waste King’s figures) | not published on the pages we read | about 3-1/8″ wide | about 3-3/8″ wide |
| Example models | Badger 1, 1XL, 100, 5, 5XL, 500, 5XP, 7XL, 700 (per the Badger manual); InSinkErator’s replacement guide uses the same three-tab steps for Evolution models | Legend L-111, L-1001, L-2600, L-3200, L-8000 | 9920, 9940, 9950, 9980 |
Waste King says the EZ Mount and Pro 3-Bolt versions differ only in the mount, the splash guard and the drain width: “There is no difference in motor or performance and is solely a customer’s product preference.”
How to Tell Which Mount You Have
- Read the label. Waste King says the model and serial number are “located on the label affixed to the bottom of your disposal.” Waste King’s model pages list the L-111, L-1001, L-2600, L-3200 and L-8000 (Legend) as EZ Mount and the 9920, 9940, 9950 and 9980 as Pro 3-Bolt Mount.
- Look at the ring above the disposer. InSinkErator’s instructions describe “three mounting screws” and a snap ring on its mount. A plastic ring that twists off by hand points to Waste King’s EZ Mount.
- Try the splash guard. On a Waste King, a guard that lifts out means EZ Mount; Waste King says the Pro 3-Bolt guard “is not removable.” Replacement guards by brand are in our splash guard guide.
Which New Disposal Fits Your Existing Mount
| Mount under your sink now | New disposal | Keep the mount? | Who says so |
|---|---|---|---|
| InSinkErator | InSinkErator | Yes. The manual asks “Is the new disposer mounting the same as the old one?” and lets you skip ahead if it is. | InSinkErator Badger manual; Badger 5 page (“fast replacement of existing InSinkErator food waste disposer”) |
| InSinkErator | Waste King EZ Mount | Usually, with the 3101AMC adapter (Waste King says it fits “most” existing 3-bolt flanges), which “eliminates the need to replace your existing sink flange.” Without it, install the EZ Mount hardware that comes in the box. | Waste King 3101AMC page |
| InSinkErator | Waste King Pro 3-Bolt | No maker says it fits. Install the Waste King mount and flange that come with the unit. | Waste King parts list (its only adapter, the 3101AMC, is for EZ Mount units) |
| Waste King EZ Mount | Waste King EZ Mount | Yes. “you can keep the top mounting hardware in place.” | Waste King FAQ |
| Waste King Pro 3-Bolt | Waste King Pro 3-Bolt | Yes, same answer from Waste King. | Waste King FAQ |
| Waste King Pro 3-Bolt | Waste King EZ Mount | No. The adapter is “Not compatible with Waste King Pro 3-Bolt Mount assemblies.” Change the mount. | Waste King 3101AMC page |
| Either Waste King mount | InSinkErator | No. Remove the old mount and flange and install the InSinkErator mount from the box. | InSinkErator Badger manual (“If NO, continue to step 7”) |
I send an occasional note when a new guide goes up — repairs worth doing yourself, and the parts that actually last. No spam, no course funnel; written by a licensed Georgia plumber.
What the Adapter Does, and What It Doesn’t
Waste King’s 3101AMC adapter “Allows for Waste King and Whirlaway EZ Mount garbage disposals to attach to most existing 3-Bolt Mount flanges, including Moen and InSinkErator brand.” It works one way only: an EZ Mount disposer onto an existing InSinkErator or Moen mount. There is no adapter on either maker’s pages that hangs an InSinkErator on a Waste King mount. We did not find the 3101AMC shipped or sold by Amazon when we checked, so there is no link to it here; Waste King’s FAQ lists companies that sell its parts.
If You Have to Change the Mount
Changing brands usually means a new sink flange too, because the flange is part of the mount. InSinkErator’s replacement steps are the model for the job:
- “loosen the three mounting screws, pry the snap ring off with a screwdriver and remove the old mounting assembly.”
- Push the old flange up through the sink hole and scrape off the old putty.
- “Place a 1/2 inch rope of plumber’s putty around the drain opening in the sink,” set the new flange, then slide on the “fiber gasket, backup flange and mounting flange.”
- Hang the disposer and check that “all 3 mounting tabs are latched over ridges,” which InSinkErator says prevents leaks and a falling disposer.
InSinkErator’s Badger manual and Waste King’s L-8000, L-2600 and 9940 pages list a sink flange and mounting hardware in the box, so you do not buy them separately for a whole-unit swap. The drain side usually carries over: Waste King says “the existing plumbing connections to your waste pipe should support any model or manufacturer,” and InSinkErator says to cut a discharge tube that is too long or buy an extension if it is too short.
What to Buy
Matched to the table above:
- Staying with InSinkErator: InSinkErator Badger 5 (1/2 HP), sold by Amazon. InSinkErator says its Quick Lock mount is for “fast replacement of existing InSinkErator” disposers.
- Only the InSinkErator mount is corroded or leaking: InSinkErator Quick Lock Mounting Flange QLM-00, sold by Amazon.
- Switching to a Waste King EZ Mount: Waste King L-3200 (3/4 HP) with 1025 splash guard and stopper or Waste King L-1001 (1/2 HP) with 1025, both sold by Amazon.
Parts You’ll Also Need
Only if you are changing the mount and flange:
- Oatey 31177 plumber’s putty (9 oz), sold by Amazon. InSinkErator lists plumber’s putty as not included in the box.
When to Call a Licensed Plumber
- The sink is thicker than a standard sink, or it is stone or a farmhouse sink. The flange may need extended parts; each maker’s thick-sink limits are in our sink flange guide.
- The undermount sink has dropped or pulled away from the counter. Fix its clips or frame before a disposer hangs from it; our undermount sink adhesive guide covers what each sink maker uses.
- The disposer is hardwired and the new one needs an outlet. InSinkErator says to have “a proper outlet installed by a qualified electrician” if the cord does not fit.
- The drain line or dishwasher hose will not line up with the new disposer.
FAQ
Will a Waste King fit an InSinkErator mount?
A Waste King EZ Mount disposer will, with Waste King’s 3101AMC adapter, which it says attaches EZ Mount units to most existing 3-bolt flanges including InSinkErator. Without the adapter, or for a Pro 3-Bolt model, install the Waste King mount that comes with it.
Will an InSinkErator fit a Waste King mount?
Not on the pages we read. Neither maker offers a part for that. Remove the Waste King mount and flange and install the InSinkErator mount from the box, as InSinkErator’s manual describes.
What is the difference between Waste King EZ Mount and Pro 3-Bolt?
Waste King lists three: EZ Mount parts are plastic and Pro 3-Bolt parts are stainless steel; EZ Mount has a removable splash guard and Pro 3-Bolt has a built-in one; the EZ Mount drain is about 3-1/8 inches wide and the Pro 3-Bolt about 3-3/8 inches. It says motor and performance are the same.
Can I reuse my InSinkErator mount with a new InSinkErator?
Yes. InSinkErator’s manual asks whether the new disposer mounting is the same as the old one and lets you skip the mount steps if it is.
Can I put a Waste King EZ Mount disposal on a Waste King Pro 3-Bolt mount?
No. Waste King says its 3101AMC adapter is not compatible with Pro 3-Bolt Mount assemblies, so change the mount.
Why Trust Plumbing Picks
Plumbing Picks is written by a licensed Georgia journeyman plumber. Every part number, size, rating and fit on this page comes from the manufacturer pages and documents listed below, which we opened and read, or, where the page says so, from an Amazon listing; none of it comes from hands-on testing. Each linked product was shipped or sold by Amazon, new and in stock, when we checked on September 24, 2026. Where a link goes to Amazon we may earn a commission at no extra cost to you. Nobody pays to be included here. More on who writes this and how we pick.
Sources
- InSinkErator: Installing a Replacement Garbage Disposal
- InSinkErator: Badger Series Installation, Care and Use Manual (81168 Rev B)
- InSinkErator: Badger 5 Garbage Disposal
- InSinkErator: Quick Lock Mount
- InSinkErator: EZ Installation Technology and FAQ
- Waste King: FAQs
- Waste King: EZ Mount 3-Bolt Mount Adapter (3101AMC)
- Waste King: Residential Disposals (EZ Mount and Pro 3-Bolt Mount)
- Waste King: L-8000 Legend (EZ Mount)
- Waste King: 9940 Pro 3-Bolt Mount
Bottom Line
Read the label first. Same brand and same mount: keep the mount. InSinkErator to a Waste King EZ Mount: the 3101AMC adapter, or the new mount from the box. Anything onto a Waste King Pro 3-Bolt, or an InSinkErator onto any Waste King mount: change the mount and flange.