Do garbage disposals come with a power cord?

This matters more than it sounds, because it is a mid-job stopper. A disposal with no cord in a kitchen with a plug socket under the sink is an afternoon spent getting a cord kit, with the sink out of service in the meantime. It is a five-dollar part and a two-minute check, and it is one of the two or three things that most often turns a straightforward swap into a two-day job.

Look under your sink. If there is an electrical outlet in the cabinet and your current disposal has a plug in it, you have a corded installation and you want a unit with a cord or a cord kit. If the wiring runs into the bottom of the disposal through a cable clamp with no plug anywhere, you have a hardwired installation.

Either is normal and both are code-compliant in most jurisdictions when done properly, but they are not interchangeable without work. Converting hardwired to corded means adding an outlet, which is electrician work. Converting corded to hardwired means removing one, which is also electrician work. The cheap path is always to match what you already have.

• The sink flange and mounting assembly. Most new disposals include one; Waste King publishes its EZ Mount twist-and-lock flange on the L-8000. If you are staying with the same brand, the existing mount often fits and you may not need it.
• The dishwasher inlet plug. New units arrive with the dishwasher inlet blanked by a knock-out plug. If a dishwasher drains into the disposal you must remove it; if not, it has to stay in or you get a leak.
• The discharge tube and gasket. The tube from the disposal to the trap is a cheap part that is often the wrong length for the new unit's height. Have one ready.
• Plumber's putty or silicone for the flange. Which to use is a real question, and plumber's putty vs silicone answers it.
• A switch, if there is not one. The InSinkErator SinkTop Switch is the usual answer - an air switch at the sink that needs a 1-1/4 inch hole and a live outlet below, and works with any brand.

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1. Cord already fitted

Waste King Legend L-8000

Waste King · Best for value 1 hp with a cord fitted

A different engineering answer to the same problem: a 2800 rpm permanent-magnet motor instead of a slower induction motor with more grind stages. High speed rather than high torque, in a lighter and narrower body, with a 20-year warranty and a factory-fitted power cord. This is the value 1 HP unit.

Published specifications

Motor

1 HP permanent magnet, 2800 rpm source

Electrical

115 V, 60 Hz, 7 A source

Grind components

Stainless steel, with stainless swivel impellers source

Mounting

EZ Mount twist-and-lock sink flange source

Weight

11.94 lb source

Warranty

20-year limited warranty source

What works

• +2800 rpm is the highest motor speed here; speed does the work that extra grind stages do on an InSinkErator
• +Under 12 lb, which makes a one-person overhead installation genuinely possible
• +Power cord pre-attached — no separate cord kit, no wiring
• +A 20-year limited warranty at this price is unusual

What does not

• −High-speed permanent-magnet motors are louder in character than slow induction motors, and no party publishes a comparable decibel figure
• −Single-stage grinding, so output fineness is not comparable to a three-stage MultiGrind
• −Waste King's parts network is smaller than InSinkErator's

Skip it if

Skip it if grind fineness matters — on a septic system, for instance, where finer output is the whole point. Three stages beat high rpm there.

$149.27 · View on Amazon→

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Raw specifications: Waste King’s own page for the Waste King Legend L-8000.

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2. Both options in the box

InSinkErator Evolution .75HP

InSinkErator · Best for households of three to five

The disposal we would fit in most houses. Three-quarters of a horsepower with three-stage grinding and stainless grind components is the point on the range where fibrous waste stops being a gamble, and SoundSeal makes it noticeably quieter than a Badger. The nine-year in-home warranty is the longest of any InSinkErator continuous-feed unit we checked.

Published specifications

Motor

3/4 HP Dura-Drive induction source

Grind stages

Three-stage MultiGrind source

Grind components

Stainless steel source

Overall height

12.25" source

Sound

SoundSeal — quieter than a standard disposal source

Septic

Safe for properly maintained septic tanks source

Warranty

9-year We Come to You limited service warranty source

What works

• +Three grind stages and stainless components — the two specs that decide whether fibrous scraps jam
• +Only three-quarters of an inch taller than a Badger 5, so it fits most cabinets that took one
• +Nine-year in-home warranty, which is a real statement about expected service life
• +EZ Connect cord and hardwire adapter in the box, so it suits either wiring situation

What does not

• −InSinkErator publishes no decibel figure, and neither do we — SoundSeal is a comparison, not a measurement
• −3/4 HP still stalls on bones and fruit pits; no domestic disposal is a bone grinder
• −Chamber capacity is not published for this model

Skip it if

Skip it if you are one or two people who scrape plates and little else — you would be paying for capability you will not use.

$239.99 · View on Amazon→

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Raw specifications: InSinkErator’s own page for the InSinkErator Evolution .75HP.

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3. Check before you buy

InSinkErator Badger 5

InSinkErator · Best for one or two people, tight cabinets

The baseline every other disposal is measured against, and an honest buy for a small household as long as you know what you are getting: half a horsepower, one grind stage, and galvanized steel grind components rather than stainless. It is short at 11-1/2", which is often the deciding factor in a shallow cabinet.

Published specifications

Motor

1/2 HP source

Grind stages

One source

Chamber capacity

26 oz source

Overall height

11-1/2" source

Grind components

Galvanized steel with stainless swivel lugs source

Motor speed

1725 rpm, 120 V, 60 Hz source

Warranty

5-year We Come to You in-home limited warranty source

What works

• +Shortest unit here at 11-1/2" — it fits cabinets a 1 HP unit cannot
• +Cheapest route to a working disposal from the brand with the best parts availability
• +Genuinely adequate for soft scraps: peelings, plate scrapings, coffee grounds
• +In-home warranty service rather than ship-it-back

What does not

• −Galvanized grind components, not stainless — this is the real difference between Badger and Evolution
• −One grind stage, so fibrous waste like celery and corn husks is where it stalls
• −No sound insulation of any kind, and the product page makes no noise claim

Skip it if

Skip it if you cook for four or more, or if anything fibrous goes down the drain. Buy 3/4 HP with three stages instead.

$110.90 · View on Amazon→

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Raw specifications: InSinkErator’s own page for the InSinkErator Badger 5.

Product photograph supplied by Amazon for this listing, used under the Associates program.

4. If there is no switch

InSinkErator SinkTop Switch (dual outlet)

InSinkErator · Best for kitchens with no wall switch

The right way to add disposal control to a kitchen with no wall switch, because it moves no electricity: the button pushes air down a tube to a relay module under the sink. That is why it can sit in a wet countertop. It needs a 1-1/4" hole and a live outlet below, and it will not create power that is not there.

Published specifications

Type

Air-activated switch, mounts to sink or countertop source

Requires

AC power below the sink source

Hole size

1-1/4" diameter source

In the kit

33" power module cord, 6 ft air tube, chrome button source

Outlets

Dual — the second can power a hot water dispenser source

Warranty

1 year source

What works

• +No mains voltage at the button, which is precisely why it belongs near a sink
• +Works with any disposal, not only InSinkErator units
• +Dual outlet means it can also feed an instant-hot tank later
• +Installs in an existing soap-dispenser or sprayer hole on many sinks

What does not

• −Needs a 1-1/4" hole — in granite or quartz that is a diamond bit and a careful hand, or a trade call
• −Still needs a live outlet under the sink; it is a switch, not a power source
• −One-year warranty, the shortest of anything in this registry

Skip it if

Skip it if you already have a working wall switch. It solves a missing-switch problem, not a convenience one.

$54.30 · View on Amazon→

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Raw specifications: InSinkErator’s own page for the InSinkErator SinkTop Switch (dual outlet).

Where a cord is fitted or included, yes — it is a standard three-prong 120 V plug for a US outlet, because that is what sits in the cabinet under an American sink. The Waste King L-8000 publishes 115 V, 60 Hz, 7 A, which is a normal domestic load for a 15 A or 20 A kitchen circuit.

What you should not do is fit a plug to a cordless unit yourself with improvised parts. Use the maker's own cord kit, which is made for that unit's terminal block and strain relief. On an electrical item under a sink, where water is a few inches away, the right part is the only part.

Possibly, and this is the question to ask before you upgrade horsepower. A 1/2 HP unit and a 1 HP unit draw different current, and if you are moving up two steps on an old circuit it is worth having the rating checked. Waste King publishes 7 A for the 1 HP L-8000; InSinkErator publishes 120 V, 60 Hz on the Badger 5 spec sheet.

The physical fit usually bites first, though. Heights run from 11-1/2 inches on a Badger 5 to 14.95 on the batch-feed Cover Control, all of it hanging below your drain. Garbage disposal sizing and fit is the page to read before you buy, 3/4 HP vs 1 HP covers the upgrade itself, and how to replace a garbage disposal is the procedure once the parts are on the counter.