If your garbage disposal is leaking onto the cabinet floor or the sink is full and will not drain, turn off the power to the disposal at the wall switch or the breaker and stop running water. Our line is answered 24/7, and same-day appointments are offered when available. Keep your hand out of the disposal, and never reach in even when it is off unless the power is cut at the breaker.
Most disposal calls come down to a leak at one of three seams, a jam that has locked the motor or a drain line that has backed up into the sink.
We find which one it is, repair what can be repaired and replace the disposal when the housing or motor is spent, then check the dishwasher connection while the cabinet is open.
Disposal leaking or sink full: what to do right now
While you wait
- Turn off the disposal switch and unplug it or flip the breaker.
- Stop using the sink and the dishwasher, since both drain through the same line.
- Empty the cabinet under the sink and set a bucket under the leak.
- Do not pour chemical drain cleaner into a full sink.
- Call the 24/7 line and tell us whether water is coming from the top, the side or the bottom.
Where a disposal leaks and why
The location of the leak tells you most of what you need to know.
| Leak location | Likely cause | Repair or replace |
|---|---|---|
| Top, where it meets the sink flange | Failed mounting seal or putty | Repair, reseal the flange |
| Side, at the dishwasher inlet | Loose or cracked dishwasher hose connection | Repair, replace the hose and clamp |
| Side, at the drain pipe | Loose gasket or a corroded outlet | Repair or replace |
| Bottom of the unit | Cracked housing or failed internal seal | Replace the disposal |
A leak from the bottom or the body almost always means the disposal has reached the end of its life, since the seals inside cannot be reached for repair.
Humming, jammed or dead: the motor side
A disposal that hums and does not turn is jammed. A foreign object such as a bone, a bottle cap or a fruit pit can lock the flywheel, and most units have a hex socket on the bottom where a wrench can rotate it free.
If the unit is silent, check the red reset button on the bottom and the breaker. If it trips again, the motor has probably overheated or failed, and replacement is likely.
A new disposal in the usual range of one-third to one horsepower costs less than most people expect, and a stronger motor helps with heavy use.
The dishwasher drain connection
Many dishwashers drain through a hose attached to a nipple on the side of the disposal. A new disposal has a plastic knockout plug in that inlet, and if it is not removed when the dishwasher is connected, the dishwasher will not drain.
A dishwasher hose that is not looped high under the counter or fitted with an air gap can also let sink water flow back in. We fix the connection, test a full dishwasher cycle and make sure the water goes down the drain.
A full kitchen sink with a disposal installed
When a sink with a disposal will not drain, the disposal is not always the problem. The clog may be in the trap, in the pipe past the disposal or in the line shared with a second bowl.
We test with the disposal off, check the trap and cable the line when needed. Our drain cleaning page covers the cable work, and a clogged double sink often needs both.
Repair or replace the disposal
| Situation | Better choice | Reason |
|---|---|---|
| Loose seal or hose, otherwise works | Repair | The motor and housing are fine |
| Cracked housing or body leak | Replace | Internal seals cannot be repaired |
| Motor dead after reset and breaker check | Replace | A burned motor is not worth rebuilding |
| Frequent jams on an undersized unit | Replace with a stronger model | More power handles normal use |
Installing a new disposal and what stays out of it
A new disposal mounts to the sink flange, connects to the drain pipe and is wired or plugged into a switched outlet. We also reconnect the dishwasher hose and test the whole setup before we leave.
What goes down matters just as much as the unit. Grease, coffee grounds in bulk, fibrous vegetables such as celery and corn husks, pasta and rice that swell, and bones should stay out. Run cold water while it works and for a few seconds after.
Do you need a permit to replace a disposal?
The city's answer
The City of Maryland Heights lists replacing a garbage disposal or dishwasher with no relocation as ordinary repair that does not need a permit. A new sink location or a new drain line is a larger job, and the building division at (314) 291-6550 can tell you what applies.
What affects the price of disposal repair
You hear a clear price before work starts. These are the factors that matter most.
Repair or replacement
A seal or hose fix is smaller than a new unit and installation.
Disposal size and features
Motor power, sound insulation and feed type change the unit price.
Electrical setup
A missing switch or outlet adds a small electrical step.
Related drain work
A clogged line is billed as drain cleaning.
Timing
Night and weekend dispatch is priced differently.
A burst or sudden leak that damages cabinets may be covered by your policy, but a worn disposal is not, so ask your insurer. For a price, call the dispatch line.
Disposal repair near Maryland Heights
We serve the 63043 ZIP code and nearby communities, including Hazelwood. If the leak is at the sink faucet and not the disposal, see faucet repair.
Product standards and safety for disposals
Waste disposers are covered by the UL 430 safety standard, and the installation instructions require a trap and a correct connection to the drain. A disposal that leaks at the flange or the dishwasher inlet is usually a mounting or hose problem and not a failed motor.
The City of Maryland Heights lists replacing fixtures without relocation as ordinary repair. Moving the sink or adding a new drain line is not, so ask the building division.
Garbage disposal questions from Maryland Heights residents
Yes. A disposal that is leaking into the cabinet or a sink that is full of standing water can be reported at night or on a weekend. The 24/7 line takes the call, and a plumber comes the same day when the schedule allows, with a clear price first.
It is jammed. Turn off the power, use the hex socket under the unit to turn the flywheel, and press the reset button. If it hums again, call us.
A leak at the top flange, the dishwasher inlet or the drain pipe can usually be repaired. A leak from the body means the unit should be replaced.
A new disposal has a knockout plug at the dishwasher inlet. If it is not removed, the dishwasher cannot drain.
The City of Maryland Heights lists replacing a disposal or dishwasher with no relocation as work that does not need a permit.
No. Grease cools and sticks inside the pipe, and large amounts of grounds settle into a paste. Both cause the clogs that bring people to the phone.