Why Is My Garbage Disposal Leaking?

By | June 18, 2016

Garbage-disposal-leakingYou might be lost for ideas at this point and just can’t keep asking yourself..

“Why is my garbage disposal leaking?”

Well don’t worry you are not alone. Many people go through the same stressful thinking, including myself. We rent a home, and it comes with a garbage disposer under our kitchen sink. We thought when we moved in that “this will be great!”.

And it is, for the most part. But after an incident recently of our leaking, and leaking, and leaking. My personal opinion on our garbage disposal is…well a little negative.

But don’t worry! I was able to handle mine on my own, and so can you if you follow these three steps to check these locations,.

You will be able to not only find your leak, but fix it too!

  1. Sink Flange


This is the flange that rests around the lip of your sinks drain hole. It’s a metal pipe that goes down and connects to your disposer. You will find this right at the bottom of the interior of your sink.


These can become worn out over time, with your dishes bouncing off them, and water can start to leak through the plumber putty that was applied to it years ago. Look for water underneath your sinks flanged connections. You may need to run some light water over it to ensure that this is the spot. Also check for dents that may have bent your flange and opened a hole.

How To Fix It

Skill: Moderately Easy

  1. You will need to buy a replacement flange, go to a nearby hardware store or big name ones like Lowes or Home Depot [get a putty knife/Plumbers Putty if you don’t have either]
  1. Get the correct size [refer to your owner manual or measure the diameter with a tape measure]
  2. Remove your garbage disposal
  3. Clean off the old putty with a putty knife [if your flange is sealed by compression replace the screws and mounting rack instead]
  4. Lay a liberal amount of new plumbers putty around where the flange will sit on your sinks surface. Add a layer around your actual flange as well.
  5. Place new sink flange in and hold it down firmly and evenly [look at directions for how long it takes to dry]
  6. Cut off any excess putty from around your seal and reinstall your garbage disposal

Hose Connections


Any of your hose-connection points. Your outlet drain and inlet dish washer drain—if you have one.


Over time of constant flow and vibration from your garbage disposer these connections can become loose. Especially the ones that are compressed by a hose clamp wrapped around it opposed to the ones that screw directly into your unit.

How To Fix It

Skill Level: Easy

  1. Wiggle your hoses to get a feel for how loose they are
  2. Screw down any clamps or screws that are loosen so that they are firmly and securely tight using a flathead or Phillips head screwdriver
  3. If leak persists, replace clamps. If it continues than you will have to replace the hose
  4. Unscrew the hose completely at each end its connected and replace it

Interior Seal


If you have water coming out of the disposal itself than you have an interior seal that has been broken. Check underneath an all the sides to track down where it is, but you may not be able to pin point it.


Wear and tear. Over time of usage the rubber seals used to case your garbage disposal are going to begin to come apart if they are not high quality parts from a high quality manufacturer.

How To Fix It

Skill: Expert-Professional

  1. Start looking for a new garbage disposal, if they are too expensive start looking at plumbing pipe to connect to your sewer drain directly
  2. Call a professional to come install your new one

If you have an interior seal that has broken, the time you will spend removing your unit, taking it apart, and putting it back together will cost you not only time but money for replace parts. Plus, you will have to reseal the entire unit when your down fixing what the problem is inside of it. You don’t have the resources, so that is why we are suggesting that you just call a professional (sinkwastecare.com) to come and take care of it.