The answer to 'why is my garbage disposal burst pipe' is that a burst pipe connected to the garbage disposal is typically caused by a clog or blockage in the disposal itself. This can lead to increased pressure in the pipes, causing them to burst or leak. Common symptoms include water leaking from under the sink, strange noises coming from the disposal, or the disposal not working at all.
To fix a burst pipe related to the garbage disposal, you'll first need to address the root cause of the clog or blockage. This may involve using a plunger, disposal cleaning tool, or calling a plumber to properly clear the disposal. Once the disposal is cleared, you'll then need to repair or replace the burst pipe. This is a job that is generally best left to a professional plumber, as it may require disassembling cabinetry, dealing with water damage, and properly resealing the new pipe.