Ariz. Admin. Code § R20-5-628
An employer shall not use Polyvinyl Chloride (PVC) piping in a place of employment for the transportation and distribution of compressed air or other compressed gases in an above-ground installation.
New Section made by final rulemaking at 9 A.A.R. 1161, effective March 11, 2003 (Supp. 03-1).