What does it mean if a pipe is labeled "collapsed"?

A pipe labeled as "collapsed" indicates that it has caved in or been deformed to the extent that it can no longer function correctly. This condition typically occurs due to external pressure from soil or other forces, or from internal pressure that exceeds the pipe's structural integrity. When a pipe collapses, the cross-section is significantly reduced or blocked, impeding the flow of water or sewage, and often necessitates replacement or extensive repairs. It's important to address such issues promptly to avoid further complications in the plumbing system. This definition aligns clearly with the implications of a collapsed pipe and distinguishes it from other issues like simple fractures or temporary deformations.