How to Install a Plumbing System for a Garbage Disposal

A garbage disposal is a modern kitchen must-have. By breaking down food waste, it keeps drains from clogging and eliminates odors brought by rotting food. Washing dishes has become easier, too, when there’s less food waste to toss in the trash.


Essentially, installing a garbage disposal unit under your sink is the more convenient, cost-effective alternative to sending food waste to landfills. Proper plumbing ensures you get the most out of it. Read on to find out how to install a plumbing system for a garbage disposal!

What to look for when buying a new garbage disposal:

1. Choose the right motor size for your needs. Take into consideration the kind – and volume- of foods you’ll be disposing of. The smaller the motor size, in terms of HP, the softer the foods have to be when you send them down into the garbage disposal.


The horsepower you buy will determine the size of the garbage disposal. If it’s too small for your household, you may be dealing with clogs and jams more often. A garbage disposal that’s too big will make you spend more money than necessary. 


2. Consider the materials of the grinding chamber and its blades to get the best bang for your buck. If the disposal’s chamber and blades are made of stainless steel, they’ll be more durable, long-lasting, and efficient. They’re also easier to clean because they don’t rust. On the other hand, plastic disposals will cost less, but may break down more easily.


3. Garbage disposals can be noisy. If this bothers you, consider buying a model with sound insulation.


Found the best unit for your household needs? To install the plumbing system for your garbage disposal, there are important steps to follow:


1. Dismantle the existing system and prepare the new assembly. This step involves disconnecting the p-trap and the horizontal extension pipe, then unscrewing the large nut and removing the strainer body.

2. Clean around the drain opening of your sink, applying Plumber’s putty to create a watertight seal.

3. Mount the sink’s fastening system.

4. Prepare the garbage disposal unit before mounting it.
Some garbage disposal units are hardwired, requiring you to manually fit the wiring. Other units only need to be plugged into an outlet.

5. Connect the dishwasher to the garbage disposal.

6. Secure the unit under the sink. This involves connecting and securing the unit’s discharge tube to the sink’s drain trap.

7.Once the unit is secured in place, test the garbage disposal for leaks by running the tap.

Get Your Plumbing Done Right the First Time! Call a Good Guy Today

Wiring and plumbing skills come in handy when you’re setting up the plumbing system for a garbage disposal.


While it’s possible to accomplish the task on your own, leaving it to professionals will leave no room for costly mistakes. Our experienced plumber can handle any garbage disposal issues that may come up, and perform the necessary repairs.


You can also reach out to us for other plumbing installation, repair, and maintenance services. You can quickly and easily schedule an appointment online and through our app.

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