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Sprinkler Fitters U.A. Local 709 >> When completing the form. the ‘fire prevention and sprinkler system installation and maintenance fitter’ card box should be ticked on the front page and evidence of having passed. Fire hazard severity zone maps; Sprinkler Fitters U.A. Local 709 sprinklerfitters709.org (physical proof required) * demonstrate clear understanding of maintenance and repairs of all types of systems including dry pipe. wet pipe.. Fire hazard severity zone maps; Every three years certified fire sprinkler.