Garbage Disposal Leaking from the Bottom
If you've opened the cabinet under your kitchen sink and found a puddle of water, and you've traced it to the bottom of your garbage disposal, you're dealing with one of the more serious disposal problems. Unlike a loose connection or a minor seal issue, a leak from the bottom of the unit almost always means the disposal needs to be replaced.
Here's what's happening and what your options are.
Why Garbage Disposals Leak from the Bottom
The bottom of your garbage disposal houses the motor and the internal seals that keep water from reaching it. Over time, these seals wear out. Vibration from regular use, temperature changes, and simple age all contribute to seal degradation. Once the internal seals fail, water seeps through the shell of the unit and drips from the bottom.
This is different from leaks that originate at the top (the sink flange connection) or the side (the dishwasher hose or discharge pipe connection). Those are connection-point leaks and can sometimes be fixed by tightening, resealing, or replacing a gasket. A bottom leak means the unit itself has failed internally.
Can You Repair a Bottom Leak?
In most cases, no. The internal seals on a garbage disposal are not designed to be serviced or replaced individually. Even if you could access them, the cost of the repair would likely exceed the cost of a new unit. If your disposal is leaking from the bottom, replacement is almost always the right call.
How to Confirm the Leak Is Coming from the Bottom
Before assuming the worst, make sure the water is actually coming from the bottom of the unit and not running down from a connection point above. Here's a simple test:
Dry off the entire disposal unit and the area under the sink. Place dry paper towels or newspaper directly under and around the disposal. Run water through the sink for a few minutes with the disposal off. Check where the paper towels are getting wet.
If the water is appearing at the very bottom of the unit (around or below the motor housing), it's a bottom leak. If it's appearing higher up, near the sink flange or one of the side connections, it may be a fixable connection issue.
What to Do Next
If you've confirmed the leak is from the bottom, don't wait too long to address it. A leaking disposal can cause water damage to the cabinet, the floor underneath, and in some cases the subfloor. Persistent moisture can also lead to mold growth under the sink.
Denver Disposal specializes in garbage disposal replacement throughout the Denver metro area. If your disposal is leaking from the bottom, we can replace the entire unit with upfront pricing and no diagnostic fees. Our pricing is on our site, and same-day appointments are available in most areas. Book an appointment online and we'll take care of the rest.