There are a few reasons why people replace their garbage disposal. Let’s go through those reasons and explore them a little bit more in depth. We will also explore some options available and installation.

When to Replace your Garbage Disposal

  • The first reason is obvious, it’s not working!  If you have confirmed that it is getting power and yet it’s still not operating, then yep, it has to be replaced.
  • The second reason, it’s noisy. First you want to check to be sure the noise is not a simple fix such as the debris lodged inside the cutting area.  Next, check underneath your sink and be sure the garbage disposal is properly secured to the underside of your sink. Sometimes the ring securing it to the underside can break or may become loose, causing the noise. Also, be sure there’s nothing resting against it, like a fire extinguisher or water filter., under the sink area. A word of caution, be sure to unplug, or turn the breaker switch off, the garbage disposal before performing any checks. Always double confirm that power has been disconnected before proceeding. Usually your will find it plugged into a wall receptacle underneath the sink. Once you’ve confirmed that these items are not your problem then replacing it is your next move.
  • The last reason people usually replace their disposer is due to age, and there simply ready for an upgrade.  With constant improvements in technology, appliances are continuously being improved, both in performance and energy efficiency.

Options for your new garbage disposal

Horsepower (HP) is the rating that tells you about the motor power. A higher horsepower will give you more, versus one with less hp. Just think of it like a blender, the more power, the better the blending of tougher foods.

  • The hp generally ranges from 1/3 – 1.25HP.  I recommend you determine the HP of your current unit and stay with that size or larger. I would not recommend going smaller. Be aware that higher hp motors are usually heavier and larger.

Continuous Feed:

  • Continuous feed simply describes the disposer as running “continuous” the instant you flip the switch to “on.” The only way to interrupt, it or stop it, is to turn the switch back to “off.”
  • These disposals are the most common and therefore generally cheaper and readily available.
  • You will usually allow them operate as long as you have waste to dump into them.
  • The biggest negative about these units is the fact that they continuously run and we sometimes have items, other than waste, fall into them causing damage to those items and/or the disposal itself.

Batch feed disposals:

  • These units are less common and tend to be more expensive.
  • They perform the same disposal grinding and slicing as the continuous feed.
  • The term “batch feed” describes the feeding process of waste. In other words, you have to add a batch of waste into the disposal and cover before the disposing part takes place.
  • The main difference, and the only reason to consider this unit over the continuous, is the fact that it will not run until the stopper, or disposal cover, is on.  This stopper is used to contain the waste you added, as well as, protecting the disposal from any unwanted falling items. The cover activates a switch when seated, therefore, even with main power applied (your on/off switch on the wall), it will only run with the cover in place.

Garbage Disposal Installation and Removal Instructions

  • First thing you will need to do is to disconnect the power from unit by unplugging from the wall receptacle or by turning off it’s breaker. Please double check that there is not power before proceeding.
  • Now you will disconnect the plumbing from the disposal drain(s). Be prepared to have some water drainage. Have towel with you under your unit. You will find the plumbing joints are a compression style fittings, that you will be able to turn fairly easily with a pair of adjustable pliers. Many times you can unscrew them by hand.
  •  Next remove disposer from the mounting ring support, located above the disposal unit and underneath the sink drain. Turn the mounting ring, or locking collar, counter clockwise which will disconnect disposal unit from the base of the sink.  The unit is heavy so be sure to support it will disconnecting it from the locking collar.
  • All right you doing great. Now pull your unit out enough to give you access to the base of the motor. There you will see the electrical cover. Go ahead and remove it and then disconnect the electrical wires from the unit. Once again, please be sure there is no power before disconnection. Toss any old wire nuts, but be sure to keep any retaining rings or connectors. You might need them later.
  • Determine if your new disposal unit will attach to the original mounting ring. If it will, then you can re-use it.Reverse your removal procedure to install the new one. However, if it does not, then let’s proceed with replacement of the mounting ring and the sinks drain flange.
  • If replacement of the sinks flange and mounting ring are necessary, then disassemble it by removing the o-ring and retaining nut on the flange. Once removed, pull the flange up and out of the top of the sink.
  • Clean up the sink hole opening to be sure it is clean and ready to receive the new parts.
  • Next install new sink flange being sure to apply plumbing putty to the underside of the flange and between the top of the sink.
  • Place an old rag inside the sink over the new flange. Place the old garbage disposal on top as too weight it down to keep it from moving.
  • Underneath the sink, begin installation of the new flange retaining nuts and mounting bracket. Be sure to follow the manufacturer’s directions provided to ensure correct part order and installation.
  • Install the electrical wire onto the new disposal. Reverse of the removal from old unit.
  • Secure your disposal to the mounting ring, turning the ring clock-wise, until the new disposal unit locks in place.
  • Install the drainage plumbing back onto your unit being sure all joints are tight. **Do not attempt to over tighten the pvc joints as they can crack or split.
  • Turn on the water and allow it to run to test your plumbing joints for any water leaks. Be sure to thoroughly check your joints. **Be sure joints are dry before water test is started, this way if they are wet afterwards you’ll know if it is not sealed correctly.
  • Last, reapply power and test your new garbage disposal.


Here is an Installation Video to Recap the Installation and Removal

Are you ready to tackle this job yourself? If so, maybe your ready to buy one. Here are few that you might consider via Amazon, over the big box stores. The first two below are continuous feed and the last one is a batch feed unit. Click to check them out.