Disconnect Plumbing and Garbage Disposal — Disconnect the Old Garbage Disposal
Part of project
Garbage Disposal Installation & Replacement: A Complete DIY Guide · Step 1 of 4
In this video
Begin by clearing out the cabinet underneath the sink. Turn off the power to the garbage disposal at the circuit breaker. Place a supportive object or bowl under the garbage disposal. Using a small wrench or the tool provided with the disposal, insert it into the lower mounting ring lug and turn to loosen the connection. Once loose, twist the entire disposal unit to detach it from the sink flange and carefully lower it down. Disconnect any attached drain hoses, such as the dishwasher line. Next, position a bucket under the P-trap to catch water. Use pliers or a pipe wrench to loosen and remove the P-trap and drain pipe connections from the sink basin. Finally, use a basin wrench to disconnect the hot and cold water supply lines from the faucet.
Goal: Remove all plumbing and appliance connections from the sink
- The garbage disposal is heavy and can fall unexpectedly. Ensure it is well-supported before and during the disconnection process.
- Taking a picture of the plumbing configuration before you start can be a helpful reference for reassembly.
Used in this video
- Disposal Wrench — Loosening the mounting ring on the garbage disposal.
- Pliers — Loosening slip nuts on the P-trap and drain lines.
- Basin Wrench — Reaching up behind the sink to loosen the faucet supply line nuts.
- Bucket — Catching residual water from drain pipes.
719K subscribers
FAQs
What are the most critical safety precautions I must take before starting this project?
Always turn off the power to the garbage disposal circuit at your electrical panel first to prevent electrical shock. Additionally, shut off the water supply to your sink to avoid unexpected leaks when disconnecting the old unit. Double-check both power and water are off before touching any wires or pipes.
Do I really need a special basin wrench for this installation, or can I use regular tools?
While some might manage with pliers and screwdrivers, a basin wrench (like the Husky 16PL0127) is highly recommended. Its specialized design allows you to easily reach and loosen the old mounting nuts in the tight space under the sink. This tool significantly simplifies the removal process and saves a lot of frustration.
What are the most common reasons for leaks after installing a new garbage disposal?
Leaks commonly occur if the plumber's putty around the sink flange wasn't applied correctly, creating an imperfect seal with the sink basin. Another frequent cause is improperly tightened or sealed connections at the discharge pipe or the dishwasher drain hose. Ensure all connections are secure and sealed properly during assembly.
What should I do if my new garbage disposal doesn't turn on after installation?
First, recheck the circuit breaker to confirm the power is on for that outlet. Then, verify all electrical connections are secure and the wire nuts are properly twisted and connected. Many disposals also have a small red reset button on the bottom; try pressing this before troubleshooting further.
Disconnect Plumbing and Garbage Disposal — Disconnect the Old Garbage Disposal
Part of project
Garbage Disposal Installation & Replacement: A Complete DIY Guide · Step 1 of 4
In this video
Begin by clearing out the cabinet underneath the sink. Turn off the power to the garbage disposal at the circuit breaker. Place a supportive object or bowl under the garbage disposal. Using a small wrench or the tool provided with the disposal, insert it into the lower mounting ring lug and turn to loosen the connection. Once loose, twist the entire disposal unit to detach it from the sink flange and carefully lower it down. Disconnect any attached drain hoses, such as the dishwasher line. Next, position a bucket under the P-trap to catch water. Use pliers or a pipe wrench to loosen and remove the P-trap and drain pipe connections from the sink basin. Finally, use a basin wrench to disconnect the hot and cold water supply lines from the faucet.
Goal: Remove all plumbing and appliance connections from the sink
- The garbage disposal is heavy and can fall unexpectedly. Ensure it is well-supported before and during the disconnection process.
- Taking a picture of the plumbing configuration before you start can be a helpful reference for reassembly.
Used in this video
- Disposal Wrench — Loosening the mounting ring on the garbage disposal.
- Pliers — Loosening slip nuts on the P-trap and drain lines.
- Basin Wrench — Reaching up behind the sink to loosen the faucet supply line nuts.
- Bucket — Catching residual water from drain pipes.
Frequently Asked Questions
What are the most critical safety precautions I must take before starting this project?
Always turn off the power to the garbage disposal circuit at your electrical panel first to prevent electrical shock. Additionally, shut off the water supply to your sink to avoid unexpected leaks when disconnecting the old unit. Double-check both power and water are off before touching any wires or pipes.
Do I really need a special basin wrench for this installation, or can I use regular tools?
While some might manage with pliers and screwdrivers, a basin wrench (like the Husky 16PL0127) is highly recommended. Its specialized design allows you to easily reach and loosen the old mounting nuts in the tight space under the sink. This tool significantly simplifies the removal process and saves a lot of frustration.
What are the most common reasons for leaks after installing a new garbage disposal?
Leaks commonly occur if the plumber's putty around the sink flange wasn't applied correctly, creating an imperfect seal with the sink basin. Another frequent cause is improperly tightened or sealed connections at the discharge pipe or the dishwasher drain hose. Ensure all connections are secure and sealed properly during assembly.
What should I do if my new garbage disposal doesn't turn on after installation?
First, recheck the circuit breaker to confirm the power is on for that outlet. Then, verify all electrical connections are secure and the wire nuts are properly twisted and connected. Many disposals also have a small red reset button on the bottom; try pressing this before troubleshooting further.