Union plumbers working on large-scale construction projects often encounter challenges such as coordinating with multiple trades, adhering to strict project timelines, and maintaining compliance with safety regulations. Effective communication with project managers, electricians, and HVAC teams is crucial to ensure that plumbing installations are properly sequenced and integrated. Additionally, union plumbers must stay updated on evolving building codes and union guidelines, which may require ongoing training. These challenges are balanced by the support and resources provided by the union, including advocacy, training, and established safety protocols.