Fire sprinkler fitters design, install, and maintain fire suppression systems including wet and dry sprinkler systems, foam systems, and special hazard systems. Most jurisdictions require specialized licensing or certification. Training typically includes 4-5 year apprenticeships with technical coursework in hydraulics and fire protection codes. Work includes system design, pipe installation, head placement, testing, and maintenance. Fitters work with copper, steel, and plastic piping in various configurations. Typical hourly rates range from $40-$75. Union fire sprinkler fitters belong to the United Association (UA) union. Specializations include clean agent systems, foam systems, kitchen hood systems, and gas detection systems. Knowledge of NFPA codes (NFPA 13, 13R, 13D) is essential.