Professional Links Alliance for PE PipeANSI American National Standards InstituteASCE American Society of Civil EngineersASTM American Society for Testing and MaterialsAPWA American Public Works AssociationAWWA American Water Works AssociationNASSCO National Association of Sewer Service CompaniesNASTT North American Society for Trenchless TechnologySPE Society of Plastics EngineersWEF Water Environment FederationPPI The Plastics Pipe Institute Inc.NSF NSF InternationalFusion Equipment McElroy Manufacturing
