How to Hook Up a Garbage Disposal to Drain Lines

When you install a garbage disposal, you cannot use the same type of drain that the sink uses. A typical drain installation uses an S-trap. The type of drain that you must use with a garbage disposal is a P-trap. It only takes a couple of minutes to remove the S-trap and replace it with the P-trap. In most cases, if you purchase a garbage disposal installation kit, it will include the P-trap that you need.

Things You'll Need

• P-trap
• Pipe wrench
• Plumber's tape
• Phillips screwdriver

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Instructions

1. • 1

     Remove the S-trap from the drainpipe using a pipe wrench.

   • 2

     Wrap the threads on the drainpipe with plumber's tape.

   • 3

     Connect the P-trap to the drainpipe. Tighten the trap using the pipe wrench.

   • 4

     Connect the straight end of the P-trap to the garbage disposal. Tighten the mounting screws using a screwdriver.