Key takeaways
- Run cold water before, during and after grinding.
- Feed scraps gradually in small amounts.
- Avoid grease, large bones, coffee grounds in bulk, pasta and rice in large quantities, and non-food items.
- Clean occasionally with ice and a small amount of citrus peel or a disposal-safe cleaner; avoid harsh drain chemicals, which can damage seals.
For most kitchens, a Waste King Legend Series continuous-feed disposal in the three-quarter to one horsepower range is the best-fit Waste King pick because it balances grinding power, noise and price, while the smaller half horsepower models suit light-use kitchens and apartments, and buyers who want the quietest operation should compare Waste King against InSinkErator and Moen before choosing. This guide covers what the Waste King range offers, how to check sink and plumbing fit, and where it falls short.
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About the Waste King range
Waste King is a long-established disposal brand that sells continuous-feed units for standard three-bolt sink mounts, plus a few batch-feed and accessory kits. The lineup is organized mostly by horsepower and by feature tier. The Legend Series is the line most reviewers and retailers discuss, and the maker lists it with galvanized or stainless grinding components, a permanently lubricated motor and a rubber splash guard. Model numbers and horsepower pairings have changed over the years, so match the exact model number to the maker’s specification sheet rather than relying on a nickname. Lineups are also sold in kits with a cord and a mounting set, and the kit contents differ by model.
At a glance
| Waste King family | Best for | Key stated points | Limits |
|---|---|---|---|
| Legend Series, higher horsepower (about 1 HP, such as the L-8000) | Families, frequent cooks, tougher scraps | The maker lists a high-torque motor, stainless steel grinding parts and a larger chamber | Heavier and louder than low-power units; check the clearance under the sink |
| Legend Series, three-quarter horsepower class (such as the L-3200) | Most households | Balanced power, standard mount, quieter than the top class | May jam on very fibrous waste if overloaded |
| Legend Series, entry horsepower class | Singles, couples, small kitchens | Compact build, standard drain connection, lower price tier | Not intended for heavy use |
| Batch-feed models and kits | Households that want a lid-activated switch | The maker states operation only occurs with the stopper in place | Slower to use; fewer models |
| Corded or cordless-switch kits | DIY installs | Includes cord and power connection hardware | Check whether the kit includes the cord |
Specifications vary by model. Read the exact horsepower, noise statement and warranty length in the maker’s literature for the model you are buying.
Horsepower and what it means
Horsepower describes the motor, not the actual results in the sink. A half horsepower model handles soft scraps and light use. Three-quarter to one horsepower handles daily use for a family. Higher horsepower typically grinds faster and handles tougher scraps with less jamming, but it also weighs more, vibrates more and costs more. Grind components matter as much as the motor: stainless parts resist rust better than coated parts, according to makers.
Fit checklist before buying
Sink mount
Most Waste King disposals use a three-bolt mount that fits the standard 3.5 to 4.5 inch sink drain opening. If you have a very old sink or a non-standard flange, check whether the existing mounting hardware can be reused or whether the kit provides the required parts.
Space under the sink
Measure the height from the sink flange to the bottom of the cabinet or to the nearest pipe. A larger unit can run to roughly a foot or more in height. Cabinets with a trash pullout, a water filter or a hot-water dispenser may restrict the space.
Plumbing and the dishwasher connection
Disposals have a knockout plug for the dishwasher drain. The plug must be removed if a dishwasher is connected, and the instructions in the manual need to be followed exactly. If you use a double sink, you may need a continuous waste fitting and trap adapter.
Electrical
Some units come with a power cord and others are hardwired. The needed outlet is typically a switched receptacle under the sink or a wall switch. If you are not confident with household wiring, hire a licensed electrician. Never work on the wiring with the power on.
Septic systems
Disposals add solids to a septic tank. If your home is on septic, ask the septic installer or local authority before adding one, and consider a model with an enzyme feature only if the maker states it is septic-appropriate.
Noise, jams and maintenance
Noise depends on motor size, insulation and how well the unit is mounted. Makers list sound insulation on some Legend models, but a disposal is a motor grinding food, and reviewers consistently report that even the quieter ones are audible. A proper mount and a rubber splash guard help.
Jams are usually caused by overloading, fibrous food such as celery, corn husks or potato peels in large quantity, or hard objects. If a unit jams, the maker typically advises switching off the power first, then using the included hex wrench in the bottom center socket to free the flywheel. Never put a hand into the disposal. Many models have a reset button on the bottom for overload cut-out.
- Run cold water before, during and after grinding.
- Feed scraps gradually in small amounts.
- Avoid grease, large bones, coffee grounds in bulk, pasta and rice in large quantities, and non-food items.
- Clean occasionally with ice and a small amount of citrus peel or a disposal-safe cleaner; avoid harsh drain chemicals, which can damage seals.
Budget tiers
| Tier | What to expect | Trade-off |
|---|---|---|
| Budget | Entry-power Waste King units with a basic grind chamber | Louder, shorter warranty, limited scraps |
| Mid-range | Three-quarter horsepower Legend class | Good for most homes; moderate noise |
| Premium | One horsepower Legend class and higher | Strong grinding; heavier and needs more cabinet space |
Pick X if…
| If you… | Pick |
|---|---|
| Cook daily for a family | Waste King Legend one horsepower class |
| Want a balance of price and power | Legend three-quarter horsepower class |
| Live in a small apartment with light use | Entry-power Legend model |
| Want a lid that must be placed to run | Batch-feed model |
| Want the quietest operation | Compare InSinkErator Evolution series or Moen GX series |
Alternatives
- InSinkErator. Badger and Evolution lines are popular with plumbers; the Evolution series makers state have extra sound insulation.
- Moen GX series. Quiet-focused, includes a push-button mounting system.
- Food waste caddy and composting. If you are on septic or have old plumbing, scraps can go to a compost pile instead.
Installation and ownership notes
Waste King kits are designed for a standard three-bolt mount, so replacing an older unit with the same style is often a direct swap. The usual steps are switching off power at the breaker, disconnecting the drain and dishwasher hose, removing the old unit, attaching the mounting assembly and the new unit, and reconnecting the plumbing. Read the manual before you start, because it lists the order and torque guidance for that model. Keep the packaging until you are sure everything fits.
Warranty
The maker lists warranty terms by model, and higher-tier units tend to carry longer terms. Read what the warranty covers and how to make a claim, and keep the receipt. Replacement parts such as splash guards, gaskets and mounting rings are sold separately for many models.
Costs of running
A disposal runs for only a short time and uses little electricity. It does use cold running water while grinding, so avoid leaving the tap running longer than necessary.
Questions to ask before buying
- Is the mounting style compatible with my sink flange?
- Does the kit include a power cord or do I need to buy one?
- Will the unit fit under my sink with the trap and any filter or dispenser?
- Does the model have the sound insulation level I want?
- Are local codes or my septic system a concern?
When to call a professional
Call a licensed plumber for leaks from the housing, persistent clogs, or a sink flange that needs replacing. Call a licensed electrician for any wiring work, a tripping breaker or burning smell. Do not put your hand into a disposal, and switch off the power before any work on it.
Frequently Asked Questions
How much horsepower do I need?
Half horsepower suits light kitchens. Three-quarter horsepower fits most family homes. One horsepower is better for heavy use or tougher scraps. The best choice also depends on cabinet space and noise tolerance.
Can I install a Waste King disposal myself?
Many homeowners do, using the included instructions and basic tools. If the wiring or drain needs changes, or if you are unsure about electrical safety, hire a licensed plumber or electrician.
Will it fit my sink?
Most standard kitchen sinks use a 3.5 to 4.5 inch drain opening and a three-bolt mount, which is what Waste King designs for. Check the opening, the depth under the sink and the trap arrangement against the manual.
What should I not put in it?
Grease, large bones, fibrous stalks in bulk, starchy foods in large amounts, and any non-food objects. The maker’s list in the manual is the final word.
Why is my disposal humming but not grinding?
That is typically a jam. Switch off the power, use the hex wrench in the bottom socket to free it, press the reset button after a few minutes, and run cold water. If it keeps happening, call a plumber.
Is it safe for a septic system?
That depends on the tank size, how much you grind and local rules. Ask your septic professional or local authority before installing, and use the disposal moderately.
