The answer to 'why is my P-trap burst pipe' is that a burst or cracked P-trap is a common plumbing issue, often caused by freeze damage, excessive pressure, or physical damage. The P-trap is the curved pipe under a sink or tub that helps prevent sewer gases from entering your home. If the P-trap cracks or bursts, it can cause water leaks and potentially flood your home.
Some common signs of a burst P-trap include water pooling under the sink or tub, gurgling noises coming from the drain, and a foul sewer odor. If you notice any of these symptoms, it's important to address the issue promptly to prevent further damage.