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Jul 10,2025

How Long Does It Take to Replace a Garbage Disposal

On average, a quality garbage disposal can last between 8 and 12 years. However, even the most durable garbage disposal needs to be replaced at some point. Some of the signs you may notice when your unit is on its last leg include frequent clogs, persistent foul odors that won’t go away with cleaning, and strange noises like grinding.

One of the most common questions we are asked is “how long does it take to replace a garbage disposal?” Here at Mr. Rooter Plumbing, we specialize in garbage disposal installation and repair, so we understand what goes into the process of ensuring an efficient replacement and how long homeowners can expect the job to take.

Factors That Influence the Time Required

While the average time to replace a garbage disposal is relatively short, a few factors can affect how long the job actually takes:

  • Condition of Existing Plumbing and Electrical Connections

If the old disposal is connected to pipes or wiring that are corroded, outdated, or damaged, additional time may be needed for repairs or upgrades. In some cases, replacing rusted mounting hardware or addressing improper electrical grounding can add extra steps.

  • Compatibility of the New Unit

If you’re replacing your old garbage disposal with a similar make and model, the installation tends to go more smoothly. However, if your new disposal is a different size or has a different mounting system, adjustments may be required. This can include resizing the mounting flange, modifying drain pipes, or aligning new connections.

  • Removal of the Old Disposal

In some situations, the old disposal can be difficult to remove due to seized bolts, hardened putty, or tight space under the sink. A skilled plumber will know how to handle these challenges, but it can still add time to the project.

  • Additional Repairs or Leaks

During the removal process, your plumbing service might discover issues such as minor leaks, worn-out gaskets, or loose fittings. Addressing these problems ensures a more reliable installation, but it may extend the service time slightly.

What Happens During the Replacement?

When a licensed plumbing service arrives to replace your garbage disposal, they’ll follow a process designed for safety and efficiency:

  • Step 1: Turn off power and water supply: Safety is the first priority, and the unit must be disconnected from its power source.
  • Step 2: Disconnect the old unit: The plumber will unbolt the old disposal from the mounting ring and disconnect it from the drain and dishwasher.
  • Step 3: Inspect and prep the area: Before installing the new disposal, they’ll check for damage or wear and clean the mounting area.
  • Step 4: Install the new disposal: The new unit is connected to the mounting ring, secured in place, and attached to the drainpipes and electrical lines.
  • Step 5: Test for functionality and leaks: Once installed, the plumber will restore power and water, run the unit, and check for any leaks or issues.

Why You Should Leave Garbage Disposal Replacement to Professionals

While some homeowners attempt to replace garbage disposals themselves, improper installation can lead to leaks, electrical hazards, or early failure of the new unit. Hiring a professional plumber ensures everything is installed to code, sealed correctly, and working as it should.

Contact Mr. Rooter Plumbing for Garbage Disposal Replacement

Replacing a failing garbage disposal doesn’t have to take long, but the job should be handled by a skilled plumbing service. A professional installation ensures that the unit is correctly connected to your plumbing and electrical systems, minimizing the risk of leaks, clogs, or electrical hazards. Mr. Rooter Plumbing is the contractor you can rely on when you need reliable garbage disposal services. Our plumbers have vast experience with all types of garbage disposals, including batch feed and continuous feed disposals. Contact us today for professional help.

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