How Old Is My Garbage Disposal? InSinkErator and Other Brands
Find how old your garbage disposal is from its serial number. On an InSinkErator, the first two digits are the year. Enter it below, or check the unit for a plainly printed date first.
Where’s the serial number?↓
- On the side of the motor housing, partway down the body — get under the sink and look up with a flashlight.
- On the bottom of the unit, near the reset button.
- Stamped into the metal collar just below the mounting assembly.
- On InSinkErator units, on a label wrapping the lower housing that also carries the model.
Not the model or horsepower rating stamped nearby. Many disposals also print a plain manufacture date, so check for a readable date before decoding anything.
- InSinkErator is the dominant brand and often prints a plain date code on the label — check for a readable date before attempting to decode the serial.
Is your garbage disposal broken, or are you just checking?
The age means different things depending on the answer. Pick one and we'll show you only what applies.
What the age actually means for a garbage disposal
A garbage disposal typically lasts 8–15 years, averaging about 12.
What does the age mean if something is wrong?
Age changes the economics; symptoms tell you what to diagnose. Neither alone determines the answer.
Usually worth diagnosing/repairing
Replacement becomes more worth considering when
Still not sure? See the full repair-or-replace guide →
And the money: An expensive repair on a garbage disposal deserves closer comparison with replacement earlier than it would on a larger appliance, given how inexpensive a new unit already is.
Where a garbage disposal sits in its lifespan
8–15 years
Typical range
~12 years
Planning average
Early life (Years 1-4)
A major repair usually doesn’t make replacement economical yet. Jams from bones or fibrous scraps are the most common issue — the reset button and a hex wrench clear nearly all of them.
Mid-life (Years 5-8)
Splash-guard wear and slow drainage are examples of cheap, isolated parts where repair still clearly makes sense.
Planning window (Years 9-12)
Repair history and component cost start to matter more than the age number alone. Grinding-chamber corrosion and body-seam leaks are examples of repairs where replacement economics may become more relevant — and a leaking body seam specifically cannot be repaired.
Beyond typical range (Years 13+)
A working disposal can keep going, but an expensive repair deserves closer scrutiny. Motor bearings and start capacitors are examples of repairs where a new unit is often the more straightforward answer, given how inexpensive a replacement already is.
*Actual lifespan depends on usage, maintenance and quality. Well-maintained appliances often exceed these averages.
If there’s a problem, age changes the repair economics; if it’s working, maintenance is the next step.
Disposals last 8 to 15 years, about 12 on average, and they are among the cheapest appliances in the house to replace outright: a new unit runs $130 to $350, plus $100 to $250 if a plumber fits it. That tips the repair-versus-replace maths toward replacement earlier than it does on a large appliance — a repair that would be obviously worth paying on a refrigerator is often not worth paying on a disposal.
On a younger disposal, jams and splash-guard wear are cheap, quick fixes with plenty of expected life left to justify them. As a disposal ages, chamber corrosion and body-seam leaks become more relevant to the repair-vs-replace decision, and by the time motor bearings or a start capacitor are the fault, a new unit is often the more straightforward answer given how little a repair would typically save.
The screening line applies earlier here than on other appliances: a repair approaching half the price of a comparable new unit installed is worth treating as a warning sign well before the disposal reaches the end of its typical lifespan, given how inexpensive a full replacement already is. Age, repair history and the specific failure still matter more than any single number.
Things worth knowing about your garbage disposal
There are no blades in there
Despite the universal fear of them, disposals contain no knives. Two blunt impellers swing outward as the plate spins and fling waste against a stationary grind ring, which does the actual work. Nothing in the chamber is sharp.
They were illegal in New York City until 1997
Cities worried that food waste would overwhelm sewer systems, and New York banned residential disposals for decades before lifting the restriction in 1997 after studies found the impact manageable.
Invented by an architect
John Hammes built the first garbage disposal in 1927, reportedly to spare his wife the chore of scraping plates. He spent over a decade refining it before it went on sale — the company he founded, InSinkErator, still dominates the category.
Common questions
How old is my garbage disposal?
Look on the side or bottom of the unit under the sink for the serial number and enter it above. Many disposals also print a plain manufacture date on the same label, which is more reliable than any decode.
Where is the serial number on a garbage disposal?
Under the sink, on the side of the motor housing partway down the body, or on the bottom near the reset button. A flashlight and a phone camera pointed upward usually beat trying to read it directly.
How long does a garbage disposal last?
Garbage disposals last 8 to 15 years, averaging about 12 (InterNACHI). Frequency of use matters more than age — a lightly used unit can run far longer.
Should I repair or replace a garbage disposal?
Often replace, once the fault is beyond a jam or a splash guard. New units are inexpensive relative to labour, so weigh any bigger repair against the cost of a new unit installed — a leaking body specifically cannot be repaired.
For disposals that are still working, regular cleaning is the practical next step — and worth knowing what a replacement runs if it is not.
Recommended products
Keep it running, or shop a replacement
Affresh Garbage Disposal Cleaner
Clears the grease and food residue that build up on the impeller and grind ring.
Check price on Amazon →
InSinkErator Badger 5XP (3/4 HP)
The practical replacement choice for most families of three to five, if yours is past the point of repair.
Check price on Amazon →As an Amazon Associate we earn from qualifying purchases. How this works
Most garbage disposals are InSinkErator, and InSinkErator puts the date at the start of the serial number — the first two digits are the year, the next two the month. It is the same thing people call the InSinkErator date code, serial number age, or manufacture date. The decoder above reads it automatically; the details are here if you want to read it yourself. Where the tag is on a garbage disposal is covered in step 1.
- Covers:
- InSinkErator, Badger, Evolution — they share one dating scheme.
- What the serial looks like:
- Before Aug 2024: starts YYMM. Newer: two location letters + year letter + 2-digit production week + 5-digit sequence (e.g. IHD2101201).
- Don’t use:
- Not the model name stamped on the side (Badger 5, Evolution Compact). The serial is the long number on the grey tag.
- Worked example:
1503123456 → March 2015
Other brands: Moen, GE and Waste King don't publish a serial-date format we've been able to verify. Check the box or the receipt; if the disposal came with the house, it is usually as old as the kitchen's last remodel. If you know the year, enter it directly above.
Did you find this helpful?
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The Garbage Disposal Series
- 1How Old Is My Garbage Disposal? InSinkErator and Other BrandsYou’re here — the tool above.
- 2How Long Does a Garbage Disposal Last?The 8-to-15-year range, what wears one out, and the signs it is near the end.
- 3How Much Does It Cost to Replace a Garbage Disposal?Unit prices by horsepower, what a plumber charges, and when a repair is the smarter spend.
- 4Should You Repair or Replace a Garbage Disposal?The leak-location test, what is worth fixing, and the half-the-price-of-a-new-unit rule.