Iowa Pipe Trades & HVAC Training Institute operates Local 33's five-year United Association apprenticeship program for plumbing, pipefitting, HVAC, steamfitting, and controls. Welding is a documented part of the apprenticeship, which combines paid on-the-job work with scheduled school rotations. Its Des Moines training center also maintains a pipe-welding shop and tests and certifies welders in Stick, TIG, MIG, and Flux-Core processes, with recurring four-hour evening weld-test sessions posted through the continuing-education calendar.