Is Your Garbage Disposal Leaking Under the Sink? Here’s Where It’s Coming From

Dripping and puddles of water are harder to ignore, however. If your garbage disposal is leaking onto the cabinet floors, then act quick if you want to avoid water damage and costly repairs.

A disposal can leak from several different points, and each one tells a slightly different story about what has gone wrong and what the fix looks like.

In this brief article brought to you by Texas Rooter, we explain where garbage disposal leaks typically originate and what you can do about each one. If you’d rather consult a trained plumber in Hurst, TX, then contact Texas Rooter to get in touch.

Most Common Source: The Sink Flange

The sink flange is that metal collar sitting in the drain opening of the sink; it connects the disposal to the sink basin above it. Typically, a layer of plumber’s putty seals the flange to the underside of the sink and mounting bolts secure the disposal unit to the flange from below.

Over time, the vibrations from the disposal works on those mounting bolts. As those loosen, they also break down the plumber’s putty seal around the flange. A failed seal is generally where most leaks drip from the sink and onto the disposal unit.

A plumber can quickly tighten the mounting bolts to preserve intact putty. If the putty is cracked or deteriorated, the plumber can apply fresh putty to reseat and secure the flange.

Easy to Overlook: The Dishwasher Inlet

Many garbage disposals include a dishwasher inlet connection on the side of the unit. This is where the dishwasher drain hose connects and routes wastewater through the disposal before exiting through the drains.

The clamp securing that hose can also loosen as the garbage disposal runs and vibrates. Since this leak drips during the dishwasher drain cycle, it is harder to trace.

Now you know. So, check and tighten hose clamps at the dishwasher inlet. If the inlet fitting itself has cracked or the hose has deteriorated, then replace them.

The plumbers at Texas Rooter come out with the tools, parts, and materials to handle most plumbing repair service the first time around. Call or message us if you need a uniformed professional.

The Drain Line Connection

The drain line connecting the disposal to the sink's P-trap and main drain carries all the wastewater that the disposal processes. This connection uses a gasket to seal the joint between the disposal's discharge outlet and the drain pipe.

You guessed it: that connection breaks down over time, too. The leak appears at the side of the disposal rather than the top or bottom, which helps distinguish it from a flange leak or an internal seal failure.

Replacing the gasket at the drain line connection is straightforward when the disposal itself is otherwise in good condition. A trained plumber can typically handle it in a single trip.

The Sign the Unit Is Done: Internal Seal Failure

Internal seals separate the motor compartment of the garbage disposal from the grinding chamber above it. When an internal seal fails, water leaks from the bottom of the disposal unit.

In most cases, an internal seal failure does not make sense to repair. A new garbage disposal installation costs much less in labor, and we typically recommend a replacement when the cost of repairs is greater than half the price of a new unit.

Call Texas Rooter Today

Whether you need emergency plumbing repair service or are ready to upgrade that 10-year-old unit, the team at Texas Rooter is always happy to help. Call or message us today to get in touch.