This repair guide will help you fix your garbage disposal.
Need a Replacement Garbage Disposal?
Price: $114.00
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Common Symptoms & Causes
If your garbage disposal has a failing drain gasket, you may notice one or more of these telltale signs:
🔨 Pro Tip from Dave
On InSinkErator Badger 5 units, the splash guard and drain gasket (part number 76754) are often sold together, and I strongly recommend replacing both at the same time since they wear at the same rate. A common mistake I see DIYers make is reinstalling the mounting flange without cleaning the old plumber’s putty residue first — that dried-up putty will prevent a proper seal every single time, no matter how tight you torque the unit down.
- Water pooling or dripping beneath the sink directly under the disposal unit
- A persistent musty or sewage-like odor coming from under the sink
- Visible moisture or rust staining around the disposal’s mounting flange
- Water leaking specifically when the disposal is running but stopping when it’s off
These issues are typically caused by a worn, cracked, or hardened drain gasket that has lost its watertight seal due to age, repeated use, or exposure to harsh drain chemicals.
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How Much Does This Repair Cost?
Replacing a drain gasket on a garbage disposal typically costs $5–$20 for the part alone when doing it yourself. A professional service call for the same repair usually runs $150–$300, including labor and parts. Tackling this repair yourself can save you well over $100, making it a smart and budget-friendly fix.
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Frequently Asked Questions
How do I know if my garbage disposal drain gasket needs replacing?
If you notice water pooling under your sink around the disposal unit, a worn or cracked drain gasket is likely the cause. Inspect the gasket for visible cracks, stiffness, or deterioration.
Do I need to hire a plumber to replace the drain gasket?
No, replacing a drain gasket is a straightforward DIY repair requiring only basic tools like pliers and a screwdriver. Most homeowners can complete the job in under an hour.
What size drain gasket should I buy for my garbage disposal?
Check your disposal’s model number, usually found on a label on the unit’s side, and match it to the manufacturer’s replacement gasket specifications. Universal drain gaskets also fit most standard garbage disposal models.
Recommended Products
These are the parts and tools we recommend for this repair, based on compatibility and customer reviews:
- InSinkErator SMG-00 Standard Mounting Gasket, Black (Compatible only with InSinkErator Badger, 444, 60s, 80s, Contractor 333 and Evergrind disposer models)
- Garbage Disposal Splash Guard for InSinkErator BUK-OO BUK-00 for Badger Disposal Replacement Rubber Drain Insert Sink Baffle for Badger 1/5/5XP/100/500
- Kitchen Sink Drain Rubber Gasket for Insinkerator,Garbage Disposal Gasket Seal Ring Replacement Kit,FLG Putty Free Sink Seals,4 pcs
- 3 3/8″ Garbage Disposal Splash Guard, QCB-AM Sink Baffle Replacement for InSinkErator Evolution Series, Upgraded Removable Quiet Collar Drain Plugs, Garbage Disposer Accessories, Black
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