The answer to 'why is my sump pump burst pipe' is a burst or damaged sump pump pipe. This is a common issue that can be caused by freezing temperatures, clogs, or wear and tear on the pipe over time. Symptoms include water leaking from the sump pump area, unusual noises from the pump, and the pump running more frequently or not at all.
In many cases, a burst sump pump pipe can be repaired by a homeowner, but it's important to address the issue quickly to prevent water damage. Solutions may include replacing the damaged section of pipe, unclogging the pipe, or installing insulation to prevent future freezing.