Garbage Disposal Leaking
Where a disposal leaks tells you what has failed: from the top means the sink flange seal, from the side means a hose connection, and from the bottom means the internal seal has gone — which is not repairable.
Before you start: Switch off power at the breaker before working under the sink, particularly where water is reaching the motor housing.
Causes, in order of likelihood
| Cause | How often | Typical cost |
|---|---|---|
| Leaking sink flange (top) | Most common | $120–$250 |
| Loose dishwasher hose connection (side) | Common | DIY |
| Loose drain flange or worn gasket (side) | Common | DIY to tighten |
| Failed internal seal (bottom) | Common | $200–$450 installed |
1. Leaking sink flange (top)Technician job
How to check: Water appears at the rim where the unit meets the sink. Plumber's putty dries out and shrinks over time.
The fix: Detach the unit, clean off the old putty, re-bed the flange with fresh putty and remount.
2. Loose dishwasher hose connection (side)You can check this
How to check: Water at the inlet spigot, typically only when the dishwasher drains.
The fix: Tighten or replace the hose clamp.
3. Loose drain flange or worn gasket (side)You can check this
How to check: Water at the discharge pipe connection.
The fix: Tighten the bolts and fit a new gasket.
4. Failed internal seal (bottom)Technician job
How to check: Water dripping from the very bottom of the housing, near the reset button.
The fix: The internal seal is not serviceable — the unit needs replacing. Leaks here also mean water is getting into the motor.
When to call a technician
A leak from the bottom of the housing means the disposal has to be replaced — no seal kit will fix it.
Describe the fault and get matched with an independent appliance technician in California.
Call (844) 659-0046