Last week, my garbage disposal decided to give up the ghost mid-dinner prep – a truly unpleasant experience! It made a horrifying grinding noise and then… nothing. That’s when I knew I needed to learn how to change out a garbage disposal. This guide will walk you through the entire process, saving you time, money, and the frustration of a malfunctioning appliance. You’ll learn everything from choosing the right replacement to properly disconnecting the old unit, and confidently installing a new one. By the end, you’ll be comfortable tackling this common household repair yourself.
Key Takeaways
- Master the process of how to change out a garbage disposal.
- Learn to safely disconnect and reconnect plumbing and electrical connections.
- Understand the different types of garbage disposals available.
- Gain confidence in tackling home repairs.
- Save money by avoiding expensive plumber calls.
Preparing for the Replacement
This section outlines the essential preparations before you begin the actual replacement of your garbage disposal. It covers the tools you’ll need, safety precautions, and how to shut off the necessary utilities. This crucial first step ensures a smooth and safe process.
Gathering Your Tools and Materials
- Basin Wrench: Essential for loosening and tightening the disposal’s mounting nuts under the sink.
- Screwdrivers (Phillips and Flathead): For removing the mounting screws and possibly electrical connections.
- Pliers (Channel-Lock and Needle-Nose): Useful for handling various nuts, bolts, and wires.
- Bucket: To catch any remaining water in the pipes.
- New Garbage Disposal: Obviously!
A basin wrench provides the leverage necessary to reach and turn those often-stubborn nuts located in the tight space under the sink. Without it, this task becomes incredibly difficult, if not impossible.
Many garbage disposals utilize a combination of Phillips and flathead screws for secure mounting. Having both types on hand ensures you’re prepared for whatever your disposal uses.
Channel-lock pliers offer excellent gripping power for larger nuts and bolts, while needle-nose pliers provide precision when working with smaller fasteners and electrical connections.
Always prepare a bucket to collect any residual water that may be in the drain lines. This prevents spills and keeps the work area clean.
Choose a replacement disposal that matches your sink’s size and plumbing configuration. Consider features like horsepower and sound level.
Safety First: Turning Off Utilities
- Turn off the power to the garbage disposal at the circuit breaker.
- Turn off the water supply to the sink by shutting off both the hot and cold water valves under the sink.
This is non-negotiable. Always turn off the power and water before working on a garbage disposal. Failing to do so could result in serious injury from electrical shock or water damage.
Disconnecting the Old Garbage Disposal
This section will guide you through disconnecting the old disposal, step-by-step. We’ll cover removing the electrical connections, detaching the drain plumbing, and disconnecting the mounting hardware. Proper disconnection is key to a smooth installation of the new unit.
Disconnecting the Electrical Wiring
- Locate the wiring connections to the disposal. Usually, these are under a small cover.
- Carefully disconnect the wires, noting which wire goes where. A photo is helpful.
- Use electrical tape to secure the loose ends of the wires to avoid accidental contact.
Electrical safety is crucial. If you’re uncomfortable working with electrical wiring, consult a qualified electrician. Incorrect wiring could cause serious harm or damage to your appliance.
Separating the Plumbing Connections
- Place a bucket under the drain pipes to catch any remaining water.
- Loosen and remove the slip nuts connecting the drain pipes to the garbage disposal using a basin wrench and pliers.
- Carefully separate the drain pipes from the disposal.
The plumbing connections can be surprisingly difficult to loosen. A bit of penetrating oil can be helpful in this step. Remember, be gentle but firm. Over-tightening can damage the pipes or disposal.
Removing the Mounting Hardware
- Locate the mounting screws or clamps that secure the disposal to the sink.
- Use the appropriate screwdrivers to remove the screws, or carefully remove any clamps.
- Carefully lower the old garbage disposal from under the sink.
Depending on the age and type of disposal, you might encounter different mounting mechanisms. Refer to your disposal’s installation manual for specifics. The weight of the old unit might surprise you.
Installing the New Garbage Disposal
This section focuses on correctly installing the new garbage disposal, mirroring the disconnection steps in reverse. Proper installation will ensure the longevity and efficiency of your new appliance.
Connecting the New Garbage Disposal
This process involves securely attaching the plumbing, reconnecting the electrical wiring, and properly fastening the new unit to your sink. It’s vital to follow all instructions carefully, ensuring a robust and leak-free installation.
- Position the new garbage disposal under the sink.
- Attach the mounting hardware (screws or clamps) to securely fasten it to the sink.
- Reconnect the drain pipes, tightening the slip nuts firmly but not excessively.
- Reconnect the electrical wiring, ensuring the wires match your previous notes or photograph.
Testing the New Disposal
- Turn on the water supply to the sink.
- Turn on the power to the garbage disposal at the circuit breaker.
- Run some cold water down the drain and turn on the garbage disposal.
- Listen for any unusual noises or vibrations.
- Check for any leaks around the plumbing connections.
If you hear any grinding or unusual noises, immediately turn off the power and check your connections. A slight humming is normal, but grinding indicates a problem.
Choosing the Right Garbage Disposal
Selecting the correct garbage disposal is crucial for long-term performance and minimizing issues. This section explores different factors to consider, such as horsepower, sound level, and features, helping you make an informed decision.
Horsepower and Grinding Power
The horsepower (HP) of a garbage disposal directly correlates to its grinding power. Higher horsepower generally indicates more power and the ability to handle larger food scraps. A disposal with a lower HP might struggle with tough items, potentially causing jams or motor burnout.
| Horsepower | Typical Use |
|---|---|
| 0.5 HP | Suitable for light use; small households with minimal food waste. |
| 0.75 HP | Good for average households, capable of handling moderate food waste. |
| 1 HP | Ideal for larger households or those who frequently dispose of large amounts of food waste. |
Sound Level Considerations
Garbage disposals can be noisy. The decibel rating (dB) indicates the sound level. Lower dB ratings mean a quieter operation. If noise is a major concern, prioritize models with lower decibel ratings. Many newer models incorporate sound dampening technology to minimize noise.
Additional Features to Consider
- Automatic Shut-Off: This safety feature automatically stops the motor if it detects an overload, preventing damage.
- Anti-Jam Technology: Helps prevent jams and ensures smooth operation. Many models incorporate a reversal feature for removing clogs.
- Multi-Stage Grinding System: Grinds food waste more efficiently and thoroughly. The more stages, typically the better the grinding.
Frequently Asked Questions
How often should I replace my garbage disposal?
The lifespan of a garbage disposal typically ranges from 8 to 15 years depending on usage and maintenance. Regular maintenance, such as occasional cleaning, can extend its life. However, if you’re experiencing frequent jams or strange noises, it’s time to consider replacement.
What are the signs that my garbage disposal needs to be replaced?
Signs include frequent jamming, loud grinding or humming, slow draining, foul odors, leaks, and a complete failure to operate. If you notice any of these issues, it’s best to assess the situation and possibly replace the unit.
Can I replace my garbage disposal myself?
Yes, most people with basic DIY skills can replace a garbage disposal themselves. This guide provides a step-by-step process. However, if you’re uncomfortable with plumbing or electrical work, it’s always best to consult a professional.
What type of garbage disposal is best for my needs?
The best type of disposal depends on your household’s size, your budget, and your disposal habits. Consider horsepower, sound level, and features to select the right model. Consult consumer reports and reviews to get an idea of real-world performance.
How much does it cost to replace a garbage disposal?
The cost varies greatly depending on the model you choose. You can expect to pay anywhere from $100 to $400 for the unit itself. Professional installation will add to the cost.
Final Thoughts
Replacing your garbage disposal may seem daunting, but by following these steps, you can confidently tackle this home repair project yourself. Remember to prioritize safety, gather the right tools, and take your time. By carefully following this guide on how to change out a garbage disposal, you’ll save money and gain valuable home repair experience. So, grab your tools and get started – your kitchen will thank you!